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2022-03-29Merge branches 'clk-xilinx', 'clk-kunit', 'clk-cs2000' and 'clk-renesas' ↵Stephen Boyd
into clk-next - Kunit tests for clk-gate implementation - Convert Cirrus Logic CS2000P driver to regmap, yamlify DT binding and add support for dynamic mode * clk-xilinx: clk: zynqmp: replace warn_once with pr_debug for failed clock ops * clk-kunit: clk: gate: Add some kunit test suites * clk-cs2000: clk: cs2000-cp: convert driver to regmap clk: cs2000-cp: freeze config during register fiddling clk: cs2000-cp: make clock skip setting configurable clk: cs2000-cp: add support for dynamic mode clk: cs2000-cp: Make aux output function controllable dt-bindings: clock: cs2000-cp: document cirrus,dynamic-mode dt-bindings: clock: cs2000-cp: document cirrus,clock-skip flag dt-bindings: clock: cs2000-cp: document aux-output-source dt-bindings: clock: convert cs2000-cp bindings to yaml * clk-renesas: dt-bindings: clock: renesas: Make example 'clocks' parsable clk: rs9: Add Renesas 9-series PCIe clock generator driver clk: fixed-factor: Introduce devm_clk_hw_register_fixed_factor_index() dt-bindings: clk: rs9: Add Renesas 9-series I2C PCIe clock generator clk: renesas: r8a779f0: Add PFC clock clk: renesas: r8a779f0: Add I2C clocks clk: renesas: r8a779f0: Add WDT clock clk: renesas: r8a779f0: Fix RSW2 clock divider clk: renesas: rzg2l-cpg: Add support for RZ/V2L SoC dt-bindings: clock: renesas: Document RZ/V2L SoC dt-bindings: clock: Add R9A07G054 CPG Clock and Reset Definitions clk: renesas: r8a779a0: Add CANFD module clock clk: renesas: r9a07g044: Update multiplier and divider values for PLL2/3 clk: renesas: r8a7799[05]: Add MLP clocks clk: renesas: r8a779f0: Add SYS-DMAC clocks
2022-03-29Merge branches 'clk-microchip', 'clk-si', 'clk-mtk', 'clk-at91' and 'clk-st' ↵Stephen Boyd
into clk-next - Clock configuration on Microchip PolarFire SoCs - Free allocations on probe error in Mediatek clk driver - Modernize Mediatek clk driver by consolidating code * clk-microchip: clk: microchip: Add driver for Microchip PolarFire SoC dt-bindings: clk: microchip: Add Microchip PolarFire host binding * clk-si: clk-si5341: replace snprintf in show functions with sysfs_emit clk: si5341: fix reported clk_rate when output divider is 2 * clk-mtk: (32 commits) clk: mediatek: Warn if clk IDs are duplicated clk: mediatek: mt8195: Implement remove functions clk: mediatek: mt8195: Implement error handling in probe functions clk: mediatek: mt8195: Hook up mtk_clk_simple_remove() clk: mediatek: Unregister clks in mtk_clk_simple_probe() error path clk: mediatek: mtk: Implement error handling in register APIs clk: mediatek: pll: Implement error handling in register API clk: mediatek: mux: Implement error handling in register API clk: mediatek: mux: Reverse check for existing clk to reduce nesting level clk: mediatek: gate: Implement error handling in register API clk: mediatek: cpumux: Implement error handling in register API clk: mediatek: mtk: Clean up included headers clk: mediatek: Add mtk_clk_simple_remove() clk: mediatek: Implement mtk_clk_unregister_composites() API clk: mediatek: Implement mtk_clk_unregister_divider_clks() API clk: mediatek: Implement mtk_clk_unregister_factors() API clk: mediatek: Implement mtk_clk_unregister_fixed_clks() API clk: mediatek: pll: Clean up included headers clk: mediatek: pll: Implement unregister API clk: mediatek: pll: Split definitions into separate header file ... * clk-at91: clk: at91: clk-master: remove dead code clk: at91: sama7g5: fix parents of PDMCs' GCLK clk: at91: sama7g5: Allow MCK1 to be exported and referenced in DT clk: at91: allow setting PMC_AUDIOPINCK clock parents via DT * clk-st: clk: stm32mp1: Add parent_data to ETHRX clock clk: stm32mp1: Split ETHCK_K into separate MUX and GATE clock
2022-03-29clk: zynq: Update the parameters to zynq_clk_register_periph_clkShubhrajyoti Datta
In case there are only one gate or the two_gate is 0 the clk1 clock passed is not used. We are passing 0 which is arm_pll. Pass a invalid clock instead. Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> Link: https://lore.kernel.org/r/20220222130903.17235-3-shubhrajyoti.datta@xilinx.com Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2022-03-29clk: zynq: trivial warning fixShubhrajyoti Datta
Fix the below warning WARNING: Missing a blank line after declarations + int enable = !!(fclk_enable & BIT(i - fclk0)); + zynq_clk_register_fclk(i, clk_output_name[i], Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> Link: https://lore.kernel.org/r/20220222130903.17235-2-shubhrajyoti.datta@xilinx.com Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2022-03-29Merge branch 'pm-opp'Rafael J. Wysocki
Merge OPP (Operating Performance Points) changes for 5.18-rc1. * pm-opp: Documentation: EM: Describe new registration method using DT OPP: Add support of "opp-microwatt" for EM registration PM: EM: add macro to set .active_power() callback conditionally OPP: Add "opp-microwatt" supporting code dt-bindings: opp: Add "opp-microwatt" entry in the OPP dt-bindings: power: avs: qcom,cpr: Convert to DT schema arm64: dts: qcom: qcs404: Rename CPU and CPR OPP tables arm64: dts: qcom: msm8996: Rename cluster OPP tables dt-bindings: opp: Convert qcom-nvmem-cpufreq to DT schema dt-bindings: opp: qcom-opp: Convert to DT schema arm64: dts: qcom: msm8996-mtp: Add msm8996 compatible dt-bindings: arm: qcom: Add msm8996 and apq8096 compatibles opp: Expose of-node's name in debugfs
2022-03-29Merge tag 'dma-mapping-5.18' of git://git.infradead.org/users/hch/dma-mappingLinus Torvalds
Pull dma-mapping updates from Christoph Hellwig: - do not zero buffer in set_memory_decrypted (Kirill A. Shutemov) - fix return value of dma-debug __setup handlers (Randy Dunlap) - swiotlb cleanups (Robin Murphy) - remove most remaining users of the pci-dma-compat.h API (Christophe JAILLET) - share the ABI header for the DMA map_benchmark with userspace (Tian Tao) - update the maintainer for DMA MAPPING BENCHMARK (Xiang Chen) - remove CONFIG_DMA_REMAP (me) * tag 'dma-mapping-5.18' of git://git.infradead.org/users/hch/dma-mapping: dma-mapping: benchmark: extract a common header file for map_benchmark definition dma-debug: fix return value of __setup handlers dma-mapping: remove CONFIG_DMA_REMAP media: v4l2-pci-skeleton: Remove usage of the deprecated "pci-dma-compat.h" API rapidio/tsi721: Remove usage of the deprecated "pci-dma-compat.h" API sparc: Remove usage of the deprecated "pci-dma-compat.h" API agp/intel: Remove usage of the deprecated "pci-dma-compat.h" API alpha: Remove usage of the deprecated "pci-dma-compat.h" API MAINTAINERS: update maintainer list of DMA MAPPING BENCHMARK swiotlb: simplify array allocation swiotlb: tidy up includes swiotlb: simplify debugfs setup swiotlb: do not zero buffer in set_memory_decrypted()
2022-03-29phy: PHY_FSL_LYNX_28G should depend on ARCH_LAYERSCAPEGeert Uytterhoeven
Freescale Layerscape Lynx 28G SerDes PHYs are only present on Freescale/NXP Layerscape SoCs. Move PHY_FSL_LYNX_28G outside the block for ARCH_MXC, as the latter is meant for i.MX8 SoCs, which is a different family than Layerscape. Add a dependency on ARCH_LAYERSCAPE, to prevent asking the user about this driver when configuring a kernel without Layerscape SoC support. Fixes: 02e2af20f4f9f2aa ("Merge tag 'char-misc-5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc") Fixes: 8f73b37cf3fbda67 ("phy: add support for the Layerscape SerDes 28G") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-03-29net: lan966x: fix kernel oops on ioctl when I/F is downMichael Walle
ioctls handled by phy_mii_ioctl() will cause a kernel oops when the interface is down. Fix it by making sure there is a PHY attached. Fixes: 735fec995b21 ("net: lan966x: Implement SIOCSHWTSTAMP and SIOCGHWTSTAMP") Signed-off-by: Michael Walle <michael@walle.cc> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Link: https://lore.kernel.org/r/20220328220350.3118969-1-michael@walle.cc Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2022-03-29nvme-multipath: fix hang when disk goes live over reconnectAnton Eidelman
nvme_mpath_init_identify() invoked from nvme_init_identify() fetches a fresh ANA log from the ctrl. This is essential to have an up to date path states for both existing namespaces and for those scan_work may discover once the ctrl is up. This happens in the following cases: 1) A new ctrl is being connected. 2) An existing ctrl is successfully reconnected. 3) An existing ctrl is being reset. While in (1) ctrl->namespaces is empty, (2 & 3) may have namespaces, and nvme_read_ana_log() may call nvme_update_ns_ana_state(). This result in a hang when the ANA state of an existing namespace changes and makes the disk live: nvme_mpath_set_live() issues IO to the namespace through the ctrl, which does NOT have IO queues yet. See sample hang below. Solution: - nvme_update_ns_ana_state() to call set_live only if ctrl is live - nvme_read_ana_log() call from nvme_mpath_init_identify() therefore only fetches and parses the ANA log; any erros in this process will fail the ctrl setup as appropriate; - a separate function nvme_mpath_update() is called in nvme_start_ctrl(); this parses the ANA log without fetching it. At this point the ctrl is live, therefore, disks can be set live normally. Sample failure: nvme nvme0: starting error recovery nvme nvme0: Reconnecting in 10 seconds... block nvme0n6: no usable path - requeuing I/O INFO: task kworker/u8:3:312 blocked for more than 122 seconds. Tainted: G E 5.14.5-1.el7.elrepo.x86_64 #1 Workqueue: nvme-wq nvme_tcp_reconnect_ctrl_work [nvme_tcp] Call Trace: __schedule+0x2a2/0x7e0 schedule+0x4e/0xb0 io_schedule+0x16/0x40 wait_on_page_bit_common+0x15c/0x3e0 do_read_cache_page+0x1e0/0x410 read_cache_page+0x12/0x20 read_part_sector+0x46/0x100 read_lba+0x121/0x240 efi_partition+0x1d2/0x6a0 bdev_disk_changed.part.0+0x1df/0x430 bdev_disk_changed+0x18/0x20 blkdev_get_whole+0x77/0xe0 blkdev_get_by_dev+0xd2/0x3a0 __device_add_disk+0x1ed/0x310 device_add_disk+0x13/0x20 nvme_mpath_set_live+0x138/0x1b0 [nvme_core] nvme_update_ns_ana_state+0x2b/0x30 [nvme_core] nvme_update_ana_state+0xca/0xe0 [nvme_core] nvme_parse_ana_log+0xac/0x170 [nvme_core] nvme_read_ana_log+0x7d/0xe0 [nvme_core] nvme_mpath_init_identify+0x105/0x150 [nvme_core] nvme_init_identify+0x2df/0x4d0 [nvme_core] nvme_init_ctrl_finish+0x8d/0x3b0 [nvme_core] nvme_tcp_setup_ctrl+0x337/0x390 [nvme_tcp] nvme_tcp_reconnect_ctrl_work+0x24/0x40 [nvme_tcp] process_one_work+0x1bd/0x360 worker_thread+0x50/0x3d0 Signed-off-by: Anton Eidelman <anton@lightbitslabs.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de>
2022-03-29nvme: fix RCU hole that allowed for endless looping in multipath round robinChris Leech
Make nvme_ns_remove match the assumptions elsewhere. 1) !NVME_NS_READY needs to be srcu synchronized to make sure nothing is running in __nvme_find_path or nvme_round_robin_path that will re-assign this ns to current_path. 2) Any matching current_path entries need to be cleared before removing from the siblings list, to prevent calling nvme_round_robin_path with an "old" ns that's off list. 3) Finally the list_del_rcu can happen, and then synchronize again before releasing any reference counts. Signed-off-by: Christoph Hellwig <hch@lst.de>
2022-03-29nvme: allow duplicate NSIDs for private namespacesSungup Moon
A NVMe subsystem with multiple controller can have private namespaces that use the same NSID under some conditions: "If Namespace Management, ANA Reporting, or NVM Sets are supported, the NSIDs shall be unique within the NVM subsystem. If the Namespace Management, ANA Reporting, and NVM Sets are not supported, then NSIDs: a) for shared namespace shall be unique; and b) for private namespace are not required to be unique." Reference: Section 6.1.6 NSID and Namespace Usage; NVM Express 1.4c spec. Make sure this specific setup is supported in Linux. Fixes: 9ad1927a3bc2 ("nvme: always search for namespace head") Signed-off-by: Sungup Moon <sungup.moon@samsung.com> [hch: refactored and fixed the controller vs subsystem based naming conflict] Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
2022-03-29nvmet: remove redundant assignment after left shiftColin Ian King
The left shift is followed by a re-assignment back to cc_css, the assignment is redundant. Fix this by replacing the "<<=" operator with "<<" instead. This cleans up the clang scan build warning: drivers/nvme/target/core.c:1124:10: warning: Although the value stored to 'cc_css' is used in the enclosing expression, the value is never actually read from 'cc_css' [deadcode.DeadStores] Signed-off-by: Colin Ian King <colin.i.king@gmail.com> Reviewed-by: Keith Busch <kbusch@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2022-03-29nvmet: use a private workqueue instead of the system workqueueSagi Grimberg
Any attempt to flush kernel-global WQs has possibility of deadlock so we should simply stop using them, instead introduce nvmet_wq which is the generic nvmet workqueue for work elements that don't explicitly require a dedicated workqueue (by the mere fact that they are using the system_wq). Changes were done using the following replaces: - s/schedule_work(/queue_work(nvmet_wq, /g - s/schedule_delayed_work(/queue_delayed_work(nvmet_wq, /g - s/flush_scheduled_work()/flush_workqueue(nvmet_wq)/g Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2022-03-29dma-buf: handle empty dma_fence_arrays gracefullyChristian König
A bug inside the new sync-file merge code created empty dma_fence_array instances. Warn about that and handle those without crashing. Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220329070001.134180-2-christian.koenig@amd.com
2022-03-29dma-buf/sync-file: fix logic error in new fence merge codeChristian König
When the array is empty because everything is signaled we can't use add_fence() to add something because that would filter the signaled fence again. Signed-off-by: Christian König <christian.koenig@amd.com> Fixes: 519f490db07e ("dma-buf/sync-file: fix warning about fence containers") Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220329070001.134180-1-christian.koenig@amd.com
2022-03-28ice: xsk: Fix indexing in ice_tx_xsk_pool()Maciej Fijalkowski
Ice driver tries to always create XDP rings array to be num_possible_cpus() sized, regardless of user's queue count setting that can be changed via ethtool -L for example. Currently, ice_tx_xsk_pool() calculates the qid by decrementing the ring->q_index by the count of XDP queues, but ring->q_index is set to 'i + vsi->alloc_txq'. When user did ethtool -L $IFACE combined 1, alloc_txq is 1, but vsi->num_xdp_txq is still num_possible_cpus(). Then, ice_tx_xsk_pool() will do OOB access and in the final result ring would not get xsk_pool pointer assigned. Then, each ice_xsk_wakeup() call will fail with error and it will not be possible to get into NAPI and do the processing from driver side. Fix this by decrementing vsi->alloc_txq instead of vsi->num_xdp_txq from ring-q_index in ice_tx_xsk_pool() so the calculation is reflected to the setting of ring->q_index. Fixes: 22bf877e528f ("ice: introduce XDP_TX fallback path") Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20220328142123.170157-5-maciej.fijalkowski@intel.com
2022-03-28ice: xsk: Stop Rx processing when ntc catches ntuMaciej Fijalkowski
This can happen with big budget values and some breakage of re-filling descriptors as we do not clear the entry that ntu is pointing at the end of ice_alloc_rx_bufs_zc. So if ntc is at ntu then it might be the case that status_error0 has an old, uncleared value and ntc would go over with processing which would result in false results. Break Rx loop when ntc == ntu to avoid broken behavior. Fixes: 3876ff525de7 ("ice: xsk: Handle SW XDP ring wrap and bump tail more often") Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20220328142123.170157-4-maciej.fijalkowski@intel.com
2022-03-28ice: xsk: Eliminate unnecessary loop iterationMagnus Karlsson
The NIC Tx ring completion routine cleans entries from the ring in batches. However, it processes one more batch than it is supposed to. Note that this does not matter from a functionality point of view since it will not find a set DD bit for the next batch and just exit the loop. But from a performance perspective, it is faster to terminate the loop before and not issue an expensive read over PCIe to get the DD bit. Fixes: 126cdfe1007a ("ice: xsk: Improve AF_XDP ZC Tx and use batching API") Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20220328142123.170157-3-maciej.fijalkowski@intel.com
2022-03-28Merge tag 'net-5.18-rc0' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net Pull networking fixes from Jakub Kicinski: "Including fixes from netfilter. Current release - regressions: - llc: only change llc->dev when bind() succeeds, fix null-deref Current release - new code bugs: - smc: fix a memory leak in smc_sysctl_net_exit() - dsa: realtek: make interface drivers depend on OF Previous releases - regressions: - sched: act_ct: fix ref leak when switching zones Previous releases - always broken: - netfilter: egress: report interface as outgoing - vsock/virtio: enable VQs early on probe and finish the setup before using them Misc: - memcg: enable accounting for nft objects" * tag 'net-5.18-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (39 commits) Revert "selftests: net: Add tls config dependency for tls selftests" net/smc: Send out the remaining data in sndbuf before close net: move net_unlink_todo() out of the header net: dsa: bcm_sf2_cfp: fix an incorrect NULL check on list iterator net: bnxt_ptp: fix compilation error selftests: net: Add tls config dependency for tls selftests memcg: enable accounting for nft objects net/sched: act_ct: fix ref leak when switching zones net/smc: fix a memory leak in smc_sysctl_net_exit() selftests: tls: skip cmsg_to_pipe tests with TLS=n octeontx2-af: initialize action variable net: sparx5: switchdev: fix possible NULL pointer dereference net/x25: Fix null-ptr-deref caused by x25_disconnect qlcnic: dcb: default to returning -EOPNOTSUPP net: sparx5: depends on PTP_1588_CLOCK_OPTIONAL net: hns3: fix phy can not link up when autoneg off and reset net: hns3: add NULL pointer check for hns3_set/get_ringparam() net: hns3: add netdev reset check for hns3_set_tunable() net: hns3: clean residual vf config after disable sriov net: hns3: add max order judgement for tx spare buffer ...
2022-03-28net: dsa: bcm_sf2_cfp: fix an incorrect NULL check on list iteratorXiaomeng Tong
The bug is here: return rule; The list iterator value 'rule' will *always* be set and non-NULL by list_for_each_entry(), so it is incorrect to assume that the iterator value will be NULL if the list is empty or no element is found. To fix the bug, return 'rule' when found, otherwise return NULL. Fixes: ae7a5aff783c7 ("net: dsa: bcm_sf2: Keep copy of inserted rules") Reviewed-by: Vladimir Oltean <olteanv@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Xiaomeng Tong <xiam0nd.tong@gmail.com> Link: https://lore.kernel.org/r/20220328032431.22538-1-xiam0nd.tong@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-03-28Merge tag 'for-linus-5.18-rc1-tag' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip Pull xen updates from Juergen Gross: - A bunch of minor cleanups - A fix for kexec in Xen dom0 when executed on a high cpu number - A fix for resuming after suspend of a Xen guest with assigned PCI devices - A fix for a crash due to not disabled preemption when resuming as Xen dom0 * tag 'for-linus-5.18-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen: fix is_xen_pmu() xen: don't hang when resuming PCI device arch:x86:xen: Remove unnecessary assignment in xen_apic_read() xen/grant-table: remove readonly parameter from functions xen/grant-table: remove gnttab_*transfer*() functions drivers/xen: use helper macro __ATTR_RW x86/xen: Fix kerneldoc warning xen: delay xen_hvm_init_time_ops() if kdump is boot on vcpu>=32 xen: use time_is_before_eq_jiffies() instead of open coding it
2022-03-28vdpa/mlx5: Avoid processing works if workqueue was destroyedEli Cohen
If mlx5_vdpa gets unloaded while a VM is running, the workqueue will be destroyed. However, vhost might still have reference to the kick function and might attempt to push new works. This could lead to null pointer dereference. To fix this, set mvdev->wq to NULL just before destroying and verify that the workqueue is not NULL in mlx5_vdpa_kick_vq before attempting to push a new work. Fixes: 5262912ef3cf ("vdpa/mlx5: Add support for control VQ and MAC setting") Signed-off-by: Eli Cohen <elic@nvidia.com> Link: https://lore.kernel.org/r/20220321141303.9586-1-elic@nvidia.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-03-28vhost: handle error while adding split ranges to iotlbAnirudh Rayabharam
vhost_iotlb_add_range_ctx() handles the range [0, ULONG_MAX] by splitting it into two ranges and adding them separately. The return value of adding the first range to the iotlb is currently ignored. Check the return value and bail out in case of an error. Signed-off-by: Anirudh Rayabharam <mail@anirudhrb.com> Link: https://lore.kernel.org/r/20220312141121.4981-1-mail@anirudhrb.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Fixes: e2ae38cf3d91 ("vhost: fix hung thread due to erroneous iotlb entries") Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
2022-03-28vdpa: support exposing the count of vqs to userspaceLongpeng
- GET_VQS_COUNT: the count of virtqueues that exposed Signed-off-by: Longpeng <longpeng2@huawei.com> Link: https://lore.kernel.org/r/20220315032553.455-4-longpeng2@huawei.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Longpeng &lt;<a href="mailto:longpeng2@huawei.com" target="_blank">longpeng2@huawei.com</a>&gt;<br> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
2022-03-28vdpa: change the type of nvqs to u32Longpeng
Change vdpa_device.nvqs and vhost_vdpa.nvqs to use u32 Signed-off-by: Longpeng <longpeng2@huawei.com> Link: https://lore.kernel.org/r/20220315032553.455-3-longpeng2@huawei.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Longpeng &lt;<a href="mailto:longpeng2@huawei.com" target="_blank">longpeng2@huawei.com</a>&gt;<br></blockquote><div><br></div><div>Acked-by: Jason Wang &lt;<a href="mailto:jasowang@redhat.com">jasowang@redhat.com</a>&gt;</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
2022-03-28vdpa: support exposing the config size to userspaceLongpeng
- GET_CONFIG_SIZE: return the size of the virtio config space. The size contains the fields which are conditional on feature bits. Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Longpeng <longpeng2@huawei.com> Link: https://lore.kernel.org/r/20220315032553.455-2-longpeng2@huawei.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
2022-03-28vdpa/mlx5: re-create forwarding rules after mac modifiedMichael Qiu
When MAC Address has been modified in guest, we only re-add the Mac to mpfs, it is not enough, because the guest network will not work correctly: the reply package from outside will go straight away to the host VF net interface. This patch recreate the flow rules, and make it work correctly. Signed-off-by: Michael Qiu <qiudayu@archeros.com> Link: https://lore.kernel.org/r/1648446492-17614-1-git-send-email-08005325@163.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Eli Cohen <elic@nvidia.com>
2022-03-28virtio: pci: check bar values read from virtio config spaceKeir Fraser
virtio pci config structures may in future have non-standard bar values in the bar field. We should anticipate this by skipping any structures containing such a reserved value. The bar value should never change: check for harmful modified values we re-read it from the config space in vp_modern_map_capability(). Also clean up an existing check to consistently use PCI_STD_NUM_BARS. Signed-off-by: Keir Fraser <keirf@google.com> Link: https://lore.kernel.org/r/20220323140727.3499235-1-keirf@google.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-03-28Revert "virtio_pci: harden MSI-X interrupts"Jason Wang
This reverts commit 9e35276a5344f74d4a3600fc4100b3dd251d5c56. Issue were reported for the drivers that are using affinity managed IRQ where manually toggling IRQ status is not expected. And we forget to enable the interrupts in the restore path as well. In the future, we will rework on the interrupt hardening. Fixes: 9e35276a5344 ("virtio_pci: harden MSI-X interrupts") Reported-by: Marc Zyngier <maz@kernel.org> Reported-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com> Link: https://lore.kernel.org/r/20220323031524.6555-2-jasowang@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-03-28Revert "virtio-pci: harden INTX interrupts"Jason Wang
This reverts commit 080cd7c3ac8701081d143a15ba17dd9475313188. Since the MSI-X interrupts hardening will be reverted in the next patch. We will rework the interrupt hardening in the future. Fixes: 080cd7c3ac87 ("virtio-pci: harden INTX interrupts") Signed-off-by: Jason Wang <jasowang@redhat.com> Link: https://lore.kernel.org/r/20220323031524.6555-1-jasowang@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-03-28drivers/net/virtio_net: Added RSS hash report control.Andrew Melnychenko
Now it's possible to control supported hashflows. Added hashflow set/get callbacks. Also, disabling RXH_IP_SRC/DST for TCP would disable then for UDP. TCP and UDP supports only: ethtool -U eth0 rx-flow-hash tcp4 sd RXH_IP_SRC + RXH_IP_DST ethtool -U eth0 rx-flow-hash tcp4 sdfn RXH_IP_SRC + RXH_IP_DST + RXH_L4_B_0_1 + RXH_L4_B_2_3 Disabling happens because VirtioNET hashtype for IP doesn't check L4 proto, it works for all IP packets(TCP, UDP, ICMP, etc.). For TCP and UDP, it's possible to set IP+PORT hashes. But disabling IP hashes will disable them for TCP and UDP simultaneously. It's possible to set IP+PORT for TCP/UDP and disable/enable IP for everything else(UDP, ICMP, etc.). Signed-off-by: Andrew Melnychenko <andrew@daynix.com> Link: https://lore.kernel.org/r/20220328175336.10802-5-andrew@daynix.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-03-28drivers/net/virtio_net: Added RSS hash report.Andrew Melnychenko
Added features for RSS hash report. If hash is provided - it sets to skb. Added checks if rss and/or hash are enabled together. Signed-off-by: Andrew Melnychenko <andrew@daynix.com> Link: https://lore.kernel.org/r/20220328175336.10802-4-andrew@daynix.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-03-28drivers/net/virtio_net: Added basic RSS support.Andrew Melnychenko
Added features for RSS. Added initialization, RXHASH feature and ethtool ops. By default RSS/RXHASH is disabled. Virtio RSS "IPv6 extensions" hashes disabled. Added ethtools ops to set key and indirection table. Signed-off-by: Andrew Melnychenko <andrew@daynix.com> Link: https://lore.kernel.org/r/20220328175336.10802-3-andrew@daynix.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-03-28drivers/net/virtio_net: Fixed padded vheader to use v1 with hash.Andrew Melnychenko
The header v1 provides additional info about RSS. Added changes to computing proper header length. In the next patches, the header may contain RSS hash info for the hash population. Signed-off-by: Andrew Melnychenko <andrew@daynix.com> Link: https://lore.kernel.org/r/20220328175336.10802-2-andrew@daynix.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-03-28virtio: use virtio_device_ready() in virtio_device_restore()Stefano Garzarella
After waking up a suspended VM, the kernel prints the following trace for virtio drivers which do not directly call virtio_device_ready() in the .restore: PM: suspend exit irq 22: nobody cared (try booting with the "irqpoll" option) Call Trace: <IRQ> dump_stack_lvl+0x38/0x49 dump_stack+0x10/0x12 __report_bad_irq+0x3a/0xaf note_interrupt.cold+0xb/0x60 handle_irq_event+0x71/0x80 handle_fasteoi_irq+0x95/0x1e0 __common_interrupt+0x6b/0x110 common_interrupt+0x63/0xe0 asm_common_interrupt+0x1e/0x40 ? __do_softirq+0x75/0x2f3 irq_exit_rcu+0x93/0xe0 sysvec_apic_timer_interrupt+0xac/0xd0 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x12/0x20 arch_cpu_idle+0x12/0x20 default_idle_call+0x39/0xf0 do_idle+0x1b5/0x210 cpu_startup_entry+0x20/0x30 start_secondary+0xf3/0x100 secondary_startup_64_no_verify+0xc3/0xcb </TASK> handlers: [<000000008f9bac49>] vp_interrupt [<000000008f9bac49>] vp_interrupt Disabling IRQ #22 This happens because we don't invoke .enable_cbs callback in virtio_device_restore(). That callback is used by some transports (e.g. virtio-pci) to enable interrupts. Let's fix it, by calling virtio_device_ready() as we do in virtio_dev_probe(). This function calls .enable_cts callback and sets DRIVER_OK status bit. This fix also avoids setting DRIVER_OK twice for those drivers that call virtio_device_ready() in the .restore. Fixes: d50497eb4e55 ("virtio_config: introduce a new .enable_cbs method") Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Link: https://lore.kernel.org/r/20220322114313.116516-1-sgarzare@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-03-28virtio_ring: remove flags check for unmap packed indirect descXuan Zhuo
When calling vring_unmap_desc_packed(), it will not encounter the situation that the flags contains VRING_DESC_F_INDIRECT. So remove this logic. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Link: https://lore.kernel.org/r/20220224110402.108161-4-xuanzhuo@linux.alibaba.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-03-28virtio_ring: remove flags check for unmap split indirect descXuan Zhuo
When calling vring_unmap_one_split_indirect(), it will not encounter the situation that the flags contains VRING_DESC_F_INDIRECT. So remove this logic. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Link: https://lore.kernel.org/r/20220224110402.108161-3-xuanzhuo@linux.alibaba.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-03-28virtio_ring: rename vring_unmap_state_packed() to vring_unmap_extra_packed()Xuan Zhuo
The actual parameter handled by vring_unmap_state_packed() is that vring_desc_extra, so this function should use "extra" instead of "state". Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Link: https://lore.kernel.org/r/20220224110402.108161-2-xuanzhuo@linux.alibaba.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-03-28net/mlx5: Add support for configuring max device MTUEli Cohen
Allow an admin creating a vdpa device to specify the max MTU for the net device. For example, to create a device with max MTU of 1000, the following command can be used: $ vdpa dev add name vdpa-a mgmtdev auxiliary/mlx5_core.sf.1 mtu 1000 This configuration mechanism assumes that vdpa is the sole real user of the function. mlx5_core could theoretically change the mtu of the function using the ip command on the mlx5_core net device but this should not be done. Reviewed-by: Si-Wei Liu<si-wei.liu@oracle.com> Signed-off-by: Eli Cohen <elic@nvidia.com> Link: https://lore.kernel.org/r/20220221121927.194728-1-elic@nvidia.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com>
2022-03-28virtio-crypto: rename skcipher algszhenwei pi
Suggested by Gonglei, rename virtio_crypto_algs.c to virtio_crypto_skcipher_algs.c. Also minor changes for function name. Thus the function of source files get clear: skcipher services in virtio_crypto_skcipher_algs.c and akcipher services in virtio_crypto_akcipher_algs.c. Signed-off-by: zhenwei pi <pizhenwei@bytedance.com> Link: https://lore.kernel.org/r/20220302033917.1295334-5-pizhenwei@bytedance.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Gonglei <arei.gonglei@huawei.com>
2022-03-28virtio-crypto: implement RSA algorithmzhenwei pi
Support rsa & pkcs1pad(rsa,sha1) with priority 150. Test with QEMU built-in backend, it works fine. 1, The self-test framework of crypto layer works fine in guest kernel 2, Test with Linux guest(with asym support), the following script test(note that pkey_XXX is supported only in a newer version of keyutils): - both public key & private key - create/close session - encrypt/decrypt/sign/verify basic driver operation - also test with kernel crypto layer(pkey add/query) All the cases work fine. rm -rf *.der *.pem *.pfx modprobe pkcs8_key_parser # if CONFIG_PKCS8_PRIVATE_KEY_PARSER=m rm -rf /tmp/data dd if=/dev/random of=/tmp/data count=1 bs=226 openssl req -nodes -x509 -newkey rsa:2048 -keyout key.pem -out cert.pem -subj "/C=CN/ST=BJ/L=HD/O=qemu/OU=dev/CN=qemu/emailAddress=qemu@qemu.org" openssl pkcs8 -in key.pem -topk8 -nocrypt -outform DER -out key.der openssl x509 -in cert.pem -inform PEM -outform DER -out cert.der PRIV_KEY_ID=`cat key.der | keyctl padd asymmetric test_priv_key @s` echo "priv key id = "$PRIV_KEY_ID PUB_KEY_ID=`cat cert.der | keyctl padd asymmetric test_pub_key @s` echo "pub key id = "$PUB_KEY_ID keyctl pkey_query $PRIV_KEY_ID 0 keyctl pkey_query $PUB_KEY_ID 0 echo "Enc with priv key..." keyctl pkey_encrypt $PRIV_KEY_ID 0 /tmp/data enc=pkcs1 >/tmp/enc.priv echo "Dec with pub key..." keyctl pkey_decrypt $PRIV_KEY_ID 0 /tmp/enc.priv enc=pkcs1 >/tmp/dec cmp /tmp/data /tmp/dec echo "Sign with priv key..." keyctl pkey_sign $PRIV_KEY_ID 0 /tmp/data enc=pkcs1 hash=sha1 > /tmp/sig echo "Verify with pub key..." keyctl pkey_verify $PRIV_KEY_ID 0 /tmp/data /tmp/sig enc=pkcs1 hash=sha1 echo "Enc with pub key..." keyctl pkey_encrypt $PUB_KEY_ID 0 /tmp/data enc=pkcs1 >/tmp/enc.pub echo "Dec with priv key..." keyctl pkey_decrypt $PRIV_KEY_ID 0 /tmp/enc.pub enc=pkcs1 >/tmp/dec cmp /tmp/data /tmp/dec echo "Verify with pub key..." keyctl pkey_verify $PUB_KEY_ID 0 /tmp/data /tmp/sig enc=pkcs1 hash=sha1 [1 compiling warning during development] Reported-by: kernel test robot <lkp@intel.com> Co-developed-by: lei he <helei.sig11@bytedance.com> Signed-off-by: lei he <helei.sig11@bytedance.com> Signed-off-by: zhenwei pi <pizhenwei@bytedance.com> Link: https://lore.kernel.org/r/20220302033917.1295334-4-pizhenwei@bytedance.com Reviewed-by: Gonglei <arei.gonglei@huawei.com> Signed-off-by: Nathan Chancellor <nathan@kernel.org> #Kconfig tweaks Link: https://lore.kernel.org/r/20220308205309.2192502-1-nathan@kernel.org Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-03-28vDPA/ifcvf: cacheline alignment for ifcvf_hwZhu Lingshan
This commit introduces a new cacheline aligned layout for ifcvf_hw. Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com> Link: https://lore.kernel.org/r/20220222115428.998334-6-lingshan.zhu@intel.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-03-28vDPA/ifcvf: implement shared IRQ featureZhu Lingshan
On some platforms/devices, there may not be enough MSI vectors allocated for the virtqueues and config changes. In such a case, the interrupt sources(virtqueues, config changes) must share an IRQ/vector, to avoid initialization failures, keep the device functional. This commit handles three cases: (1) number of the allocated vectors == the number of virtqueues + 1 (config changes), every virtqueue and the config interrupt has a separated vector/IRQ, the best and the most likely case. (2) number of the allocated vectors is less than the best case, but greater than 1. In this case, all virtqueues share a vector/IRQ, the config interrupt has a separated vector/IRQ (3) only one vector is allocated, in this case, the virtqueues and the config interrupt share a vector/IRQ. The worst and most unlikely case. Otherwise, it needs to fail. This commit introduces some helper functions: ifcvf_set_vq_vector() and ifcvf_set_config_vector() sets virtqueue vector and config vector in the device config space, so that the device can send interrupt DMA. Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com> Link: https://lore.kernel.org/r/20220222115428.998334-5-lingshan.zhu@intel.com Signed-off-by: Tom Rix <trix@redhat.com> Link: https://lore.kernel.org/r/20220315124130.1710030-1-trix@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-03-28vDPA/ifcvf: implement device MSIX vector allocatorZhu Lingshan
This commit implements a MSIX vector allocation helper for vqs and config interrupts. Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com> Link: https://lore.kernel.org/r/20220222115428.998334-4-lingshan.zhu@intel.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-03-28vhost_vdpa: don't setup irq offloading when irq_num < 0Zhu Lingshan
When irq number is negative(e.g., -EINVAL), the virtqueue may be disabled or the virtqueues are sharing a device irq. In such case, we should not setup irq offloading for a virtqueue. Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com> Link: https://lore.kernel.org/r/20220222115428.998334-3-lingshan.zhu@intel.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-03-28vDPA/ifcvf: make use of virtio pci modern IO helpers in ifcvfZhu Lingshan
This commit discards ifcvf_ioreadX()/writeX(), use virtio pci modern IO helpers instead Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com> Link: https://lore.kernel.org/r/20220222115428.998334-2-lingshan.zhu@intel.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-03-28vhost: cache avail index in vhost_enable_notify()Stefano Garzarella
In vhost_enable_notify() we enable the notifications and we read the avail index to check if new buffers have become available in the meantime. We are not caching the avail index, so when the device will call vhost_get_vq_desc(), it will find the old value in the cache and it will read the avail index again. It would be better to refresh the cache every time we read avail index, so let's change vhost_enable_notify() caching the value in `avail_idx` and compare it with `last_avail_idx` to check if there are new buffers available. We don't expect a significant performance boost because the above path is not very common, indeed vhost_enable_notify() is often called with unlikely(), expecting that avail index has not been updated. We ran virtio-test/vhost-test and noticed minimal improvement as expected. To stress the patch more, we modified vhost_test.ko to call vhost_enable_notify()/vhost_disable_notify() on every cycle when calling vhost_get_vq_desc(); in this case we observed a more evident improvement, with a reduction of the test execution time of about 3.7%. Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Link: https://lore.kernel.org/r/20220121153108.187291-1-sgarzare@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
2022-03-28drivers/virtio: Enable virtio mem for ARM64Gavin Shan
This enables virtio-mem device support by allowing to enable the corresponding kernel config option (CONFIG_VIRTIO_MEM) on the architecture. Signed-off-by: Gavin Shan <gshan@redhat.com> Acked-by: David Hildenbrand <david@redhat.com> Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Link: https://lore.kernel.org/r/20220119010551.181405-1-gshan@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Gavin Shan <gshan@redhat.com> Acked-by: David Hildenbrand <david@redhat.com> Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Acked-by: Michael S. Tsirkin <mst@redhat.com>
2022-03-28net: bnxt_ptp: fix compilation errorDamien Le Moal
The Broadcom bnxt_ptp driver does not compile with GCC 11.2.2 when CONFIG_WERROR is enabled. The following error is generated: drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c: In function ‘bnxt_ptp_enable’: drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c:400:43: error: array subscript 255 is above array bounds of ‘struct pps_pin[4]’ [-Werror=array-bounds] 400 | ptp->pps_info.pins[pin_id].event = BNXT_PPS_EVENT_EXTERNAL; | ~~~~~~~~~~~~~~~~~~^~~~~~~~ In file included from drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c:20: drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h:75:24: note: while referencing ‘pins’ 75 | struct pps_pin pins[BNXT_MAX_TSIO_PINS]; | ^~~~ cc1: all warnings being treated as errors This is due to the function ptp_find_pin() returning a pin ID of -1 when a valid pin is not found and this error never being checked. Change the TSIO_PIN_VALID() function to also check that a pin ID is not negative and use this macro in bnxt_ptp_enable() to check the result of the calls to ptp_find_pin() to return an error early for invalid pins. This fixes the compilation error. Cc: <stable@vger.kernel.org> Fixes: 9e518f25802c ("bnxt_en: 1PPS functions to configure TSIO pins") Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Reviewed-by: Michael Chan <michael.chan@broadcom.com> Link: https://lore.kernel.org/r/20220328062708.207079-1-damien.lemoal@opensource.wdc.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-03-28Merge tag 'tty-5.18-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial driver updates from Greg KH: "Here are the big set of tty and serial driver changes for 5.18-rc1. Nothing major, some more good cleanups from Jiri and 2 new serial drivers. Highlights include: - termbits cleanups - export symbol cleanups and other core cleanups from Jiri Slaby - new sunplus and mvebu uart drivers (amazing that people are still creating new uarts...) - samsung serial driver cleanups - ldisc 29 is now "reserved" for experimental/development line disciplines - lots of other tiny fixes and cleanups to serial drivers and bindings All of these have been in linux-next for a while with no reported issues" * tag 'tty-5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (104 commits) vt_ioctl: fix potential spectre v1 in VT_DISALLOCATE serial: 8250: fix XOFF/XON sending when DMA is used tty: serial: samsung: Add ARTPEC-8 support dt-bindings: serial: samsung: Add ARTPEC-8 UART serial: sc16is7xx: Clear RS485 bits in the shutdown tty: serial: samsung: simplify getting OF match data tty: serial: samsung: constify variables and pointers tty: serial: samsung: constify s3c24xx_serial_drv_data members tty: serial: samsung: constify UART name tty: serial: samsung: constify s3c24xx_serial_drv_data tty: serial: samsung: reduce number of casts tty: serial: samsung: embed s3c2410_uartcfg in parent structure tty: serial: samsung: embed s3c24xx_uart_info in parent structure serial: 8250_tegra: mark acpi_device_id as unused with !ACPI tty: serial: bcm63xx: use more precise Kconfig symbol serial: SERIAL_SUNPLUS should depend on ARCH_SUNPLUS tty: serial: jsm: fix two assignments in if conditions tty: serial: jsm: remove redundant assignments to variable linestatus serial: 8250_mtk: make two read-only arrays static const serial: samsung_tty: do not unlock port->lock for uart_write_wakeup() ...
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