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2018-12-04net/mlx5: Update mlx5_ifc with DEVX UCTX capabilities bitsYishai Hadas
Expose device capabilities for DEVX user context, it includes which caps the device is supported and a matching bit to set as part of user context creation. Signed-off-by: Yishai Hadas <yishaih@mellanox.com> Reviewed-by: Artemy Kovalyov <artemyko@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2018-12-04dt-bindings: clock: Add Allwinner suniv F1C100s CCUMesih Kilinc
Add compatiple string for Allwinner suniv F1C100s CCU. Add clock and reset definitions. Signed-off-by: Mesih Kilinc <mesihkilinc@gmail.com> Acked-by: Maxime Ripard <maxime.ripard@bootlin.com> Acked-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
2018-12-04RDMA/mlx5: Initialize SRQ tables on mlx5_ibLeon Romanovsky
Transfer initialization and cleanup from mlx5_priv struct of mlx5_core_dev to be part of mlx5_ib_dev. This completes removal of SRQ from mlx5_core. Reviewed-by: Mark Bloch <markb@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2018-12-04net/mlx5: Move SRQ functions to RDMA partLeon Romanovsky
There is no need to keep SRQ which is RDMA object in mlx5_core. In this patch, we partially move the execution code, while next patches will move table initialization/release logic too. Reviewed-by: Mark Bloch <markb@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2018-12-04net/mlx5: Remove dead transobj codeLeon Romanovsky
Delete functions which are not called and not needed. Reviewed-by: Mark Bloch <markb@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2018-12-04net/mlx5: Align SRQ licenses and copyright informationLeon Romanovsky
Ensure that both RDMA and netdev parts of SRQ implementation has same copyright and license information annotated by SPDX tags. Reviewed-by: Mark Bloch <markb@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2018-12-04Merge branch 'for-mingo' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu Pull RCU changes from Paul E. McKenney: - Convert RCU's BUG_ON() and similar calls to WARN_ON() and similar. - Replace calls of RCU-bh and RCU-sched update-side functions to their vanilla RCU counterparts. This series is a step towards complete removal of the RCU-bh and RCU-sched update-side functions. ( Note that some of these conversions are going upstream via their respective maintainers. ) - Documentation updates, including a number of flavor-consolidation updates from Joel Fernandes. - Miscellaneous fixes. - Automate generation of the initrd filesystem used for rcutorture testing. - Convert spin_is_locked() assertions to instead use lockdep. ( Note that some of these conversions are going upstream via their respective maintainers. ) - SRCU updates, especially including a fix from Dennis Krein for a bag-on-head-class bug. - RCU torture-test updates. Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-12-04jbd2: update locking documentation for transaction_tAlexander Lochmann
The following members of struct transaction_s aka transaction_t were turned into lock-free variables in the past: - t_updates - t_outstanding_credits - t_handle_count However, the documentation has not been updated yet. This commit replaced the annotated lock by [none]. Found by LockDoc (Alexander Lochmann, Horst Schirmeier and Olaf Spinczyk) Signed-off-by: Alexander Lochmann <alexander.lochmann@tu-dortmund.de> Signed-off-by: Horst Schirmeier <horst.schirmeier@tu-dortmund.de> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2018-12-03jbd2: avoid long hold times of j_state_lock while committing a transactionJan Kara
We can hold j_state_lock for writing at the beginning of jbd2_journal_commit_transaction() for a rather long time (reportedly for 30 ms) due cleaning revoke bits of all revoked buffers under it. The handling of revoke tables as well as cleaning of t_reserved_list, and checkpoint lists does not need j_state_lock for anything. It is only needed to prevent new handles from joining the transaction. Generally T_LOCKED transaction state prevents new handles from joining the transaction - except for reserved handles which have to allowed to join while we wait for other handles to complete. To prevent reserved handles from joining the transaction while cleaning up lists, add new transaction state T_SWITCH and watch for it when starting reserved handles. With this we can just drop the lock for operations that don't need it. Reported-and-tested-by: Adrian Hunter <adrian.hunter@intel.com> Suggested-by: "Theodore Y. Ts'o" <tytso@mit.edu> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2018-12-03pstore: Convert buf_lock to semaphoreKees Cook
Instead of running with interrupts disabled, use a semaphore. This should make it easier for backends that may need to sleep (e.g. EFI) when performing a write: |BUG: sleeping function called from invalid context at kernel/sched/completion.c:99 |in_atomic(): 1, irqs_disabled(): 1, pid: 2236, name: sig-xstate-bum |Preemption disabled at: |[<ffffffff99d60512>] pstore_dump+0x72/0x330 |CPU: 26 PID: 2236 Comm: sig-xstate-bum Tainted: G D 4.20.0-rc3 #45 |Call Trace: | dump_stack+0x4f/0x6a | ___might_sleep.cold.91+0xd3/0xe4 | __might_sleep+0x50/0x90 | wait_for_completion+0x32/0x130 | virt_efi_query_variable_info+0x14e/0x160 | efi_query_variable_store+0x51/0x1a0 | efivar_entry_set_safe+0xa3/0x1b0 | efi_pstore_write+0x109/0x140 | pstore_dump+0x11c/0x330 | kmsg_dump+0xa4/0xd0 | oops_exit+0x22/0x30 ... Reported-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Fixes: 21b3ddd39fee ("efi: Don't use spinlocks for efi vars") Signed-off-by: Kees Cook <keescook@chromium.org>
2018-12-03pstore: Map PSTORE_TYPE_* to stringsJoel Fernandes (Google)
In later patches we will need to map types to names, so create a constant table for that which can also be used in different parts of old and new code. This saves the type in the PRZ which will be useful in later patches. Instead of having an explicit PSTORE_TYPE_UNKNOWN, just use ..._MAX. This includes removing the now redundant filename templates which can use a single format string. Also, there's no reason to limit the "is it still compressed?" test to only PSTORE_TYPE_DMESG when building the pstorefs filename. Records are zero-initialized, so a backend would need to have explicitly set compressed=1. Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org> Co-developed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Kees Cook <keescook@chromium.org>
2018-12-03pstore: Replace open-coded << with BIT()Kees Cook
Minor clean-up to use BIT() (as already done in pstore_ram.h). Signed-off-by: Kees Cook <keescook@chromium.org>
2018-12-03pstore: Improve and update some comments and status outputKees Cook
This improves and updates some comments: - dump handler comment out of sync from calling convention - fix kern-doc typo and improves status output: - reminder that only kernel crash dumps are compressed - do not be silent about ECC infrastructure failures Signed-off-by: Kees Cook <keescook@chromium.org>
2018-12-03pstore/ram: Add kern-doc for struct persistent_ram_zoneKees Cook
The struct persistent_ram_zone wasn't well documented. This adds kern-doc for it. Signed-off-by: Kees Cook <keescook@chromium.org>
2018-12-03pstore: Avoid duplicate call of persistent_ram_zap()Peng Wang
When initialing a prz, if invalid data is found (no PERSISTENT_RAM_SIG), the function call path looks like this: ramoops_init_prz -> persistent_ram_new -> persistent_ram_post_init -> persistent_ram_zap persistent_ram_zap As we can see, persistent_ram_zap() is called twice. We can avoid this by adding an option to persistent_ram_new(), and only call persistent_ram_zap() when it is needed. Signed-off-by: Peng Wang <wangpeng15@xiaomi.com> [kees: minor tweak to exit path and commit log] Signed-off-by: Kees Cook <keescook@chromium.org>
2018-12-03Merge branch 'for-linus/pstore' into for-next/pstoreKees Cook
2018-12-04netfilter: nf_tables: fix suspicious RCU usage in nft_chain_stats_replace()Taehee Yoo
basechain->stats is rcu protected data which is updated from nft_chain_stats_replace(). This function is executed from the commit phase which holds the pernet nf_tables commit mutex - not the global nfnetlink subsystem mutex. Test commands to reproduce the problem are: %iptables-nft -I INPUT %iptables-nft -Z %iptables-nft -Z This patch uses RCU calls to handle basechain->stats updates to fix a splat that looks like: [89279.358755] ============================= [89279.363656] WARNING: suspicious RCU usage [89279.368458] 4.20.0-rc2+ #44 Tainted: G W L [89279.374661] ----------------------------- [89279.379542] net/netfilter/nf_tables_api.c:1404 suspicious rcu_dereference_protected() usage! [...] [89279.406556] 1 lock held by iptables-nft/5225: [89279.411728] #0: 00000000bf45a000 (&net->nft.commit_mutex){+.+.}, at: nf_tables_valid_genid+0x1f/0x70 [nf_tables] [89279.424022] stack backtrace: [89279.429236] CPU: 0 PID: 5225 Comm: iptables-nft Tainted: G W L 4.20.0-rc2+ #44 [89279.430135] Call Trace: [89279.430135] dump_stack+0xc9/0x16b [89279.430135] ? show_regs_print_info+0x5/0x5 [89279.430135] ? lockdep_rcu_suspicious+0x117/0x160 [89279.430135] nft_chain_commit_update+0x4ea/0x640 [nf_tables] [89279.430135] ? sched_clock_local+0xd4/0x140 [89279.430135] ? check_flags.part.35+0x440/0x440 [89279.430135] ? __rhashtable_remove_fast.constprop.67+0xec0/0xec0 [nf_tables] [89279.430135] ? sched_clock_cpu+0x126/0x170 [89279.430135] ? find_held_lock+0x39/0x1c0 [89279.430135] ? hlock_class+0x140/0x140 [89279.430135] ? is_bpf_text_address+0x5/0xf0 [89279.430135] ? check_flags.part.35+0x440/0x440 [89279.430135] ? __lock_is_held+0xb4/0x140 [89279.430135] nf_tables_commit+0x2555/0x39c0 [nf_tables] Fixes: f102d66b335a4 ("netfilter: nf_tables: use dedicated mutex to guard transactions") Signed-off-by: Taehee Yoo <ap420073@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2018-12-03sbitmap: fix sbitmap_for_each_set()Omar Sandoval
We need to ignore bits in the cleared mask when iterating over all set bits. Fixes: ea86ea2cdced ("sbitmap: ammortize cost of clearing bits") Reported-by: Jens Axboe@kernel.dk> Signed-off-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-12-03udp: elide zerocopy operation in hot pathWillem de Bruijn
With MSG_ZEROCOPY, each skb holds a reference to a struct ubuf_info. Release of its last reference triggers a completion notification. The TCP stack in tcp_sendmsg_locked holds an extra ref independent of the skbs, because it can build, send and free skbs within its loop, possibly reaching refcount zero and freeing the ubuf_info too soon. The UDP stack currently also takes this extra ref, but does not need it as all skbs are sent after return from __ip(6)_append_data. Avoid the extra refcount_inc and refcount_dec_and_test, and generally the sock_zerocopy_put in the common path, by passing the initial reference to the first skb. This approach is taken instead of initializing the refcount to 0, as that would generate error "refcount_t: increment on 0" on the next skb_zcopy_set. Changes v3 -> v4 - Move skb_zcopy_set below the only kfree_skb that might cause a premature uarg destroy before skb_zerocopy_put_abort - Move the entire skb_shinfo assignment block, to keep that cacheline access in one place Signed-off-by: Willem de Bruijn <willemb@google.com> Acked-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-12-03udp: msg_zerocopyWillem de Bruijn
Extend zerocopy to udp sockets. Allow setting sockopt SO_ZEROCOPY and interpret flag MSG_ZEROCOPY. This patch was previously part of the zerocopy RFC patchsets. Zerocopy is not effective at small MTU. With segmentation offload building larger datagrams, the benefit of page flipping outweights the cost of generating a completion notification. tools/testing/selftests/net/msg_zerocopy.sh after applying follow-on test patch and making skb_orphan_frags_rx same as skb_orphan_frags: ipv4 udp -t 1 tx=191312 (11938 MB) txc=0 zc=n rx=191312 (11938 MB) ipv4 udp -z -t 1 tx=304507 (19002 MB) txc=304507 zc=y rx=304507 (19002 MB) ok ipv6 udp -t 1 tx=174485 (10888 MB) txc=0 zc=n rx=174485 (10888 MB) ipv6 udp -z -t 1 tx=294801 (18396 MB) txc=294801 zc=y rx=294801 (18396 MB) ok Changes v1 -> v2 - Fixup reverse christmas tree violation v2 -> v3 - Split refcount avoidance optimization into separate patch - Fix refcount leak on error in fragmented case (thanks to Paolo Abeni for pointing this one out!) - Fix refcount inc on zero - Test sock_flag SOCK_ZEROCOPY directly in __ip_append_data. This is needed since commit 5cf4a8532c99 ("tcp: really ignore MSG_ZEROCOPY if no SO_ZEROCOPY") did the same for tcp. Signed-off-by: Willem de Bruijn <willemb@google.com> Acked-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-12-03sctp: kfree_rcu asocXin Long
In sctp_hash_transport/sctp_epaddr_lookup_transport, it dereferences a transport's asoc under rcu_read_lock while asoc is freed not after a grace period, which leads to a use-after-free panic. This patch fixes it by calling kfree_rcu to make asoc be freed after a grace period. Note that only the asoc's memory is delayed to free in the patch, it won't cause sk to linger longer. Thanks Neil and Marcelo to make this clear. Fixes: 7fda702f9315 ("sctp: use new rhlist interface on sctp transport rhashtable") Fixes: cd2b70875058 ("sctp: check duplicate node before inserting a new transport") Reported-by: syzbot+0b05d8aa7cb185107483@syzkaller.appspotmail.com Reported-by: syzbot+aad231d51b1923158444@syzkaller.appspotmail.com Suggested-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-12-03Merge tag 'wireless-drivers-next-for-davem-2018-11-30' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next Kalle Valo says: ==================== wireless-drivers-next patches for 4.21 First set of patches for 4.21. Most notable here is support for Quantenna's QSR1000/QSR2000 chipsets and more flexible ways to provide nvram files for brcmfmac. Major changes: brcmfmac * add support for first trying to get a board specific nvram file * add support for getting nvram contents from EFI variables qtnfmac * use single PCIe driver for all platforms and rename Kconfig option CONFIG_QTNFMAC_PEARL_PCIE to CONFIG_QTNFMAC_PCIE * add support for QSR1000/QSR2000 (Topaz) family of chipsets ath10k * add support for WCN3990 firmware crash recovery * add firmware memory dump support for QCA4019 wil6210 * add firmware error recovery while in AP mode ath9k * remove experimental notice from dynack feature iwlwifi * PCI IDs for some new 9000-series cards * improve antenna usage on connection problems * new firmware debugging infrastructure * some more work on 802.11ax * improve support for multiple RF modules with 22000 devices cordic * move cordic macros and defines to a public header file * convert brcmsmac and b43 to fully use cordic library ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2018-12-03of: net: kill of_get_nvmem_mac_address()Bartosz Golaszewski
We've switched all users to nvmem_get_mac_address(). Remove the now dead code. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-12-03net: ethernet: provide nvmem_get_mac_address()Bartosz Golaszewski
We already have of_get_nvmem_mac_address() but some non-DT systems want to read the MAC address from NVMEM too. Implement a generalized routine that takes struct device as argument. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-12-03rhashtable: detect when object movement between tables might have ↵NeilBrown
invalidated a lookup Some users of rhashtables might need to move an object from one table to another - this appears to be the reason for the incomplete usage of NULLS markers. To support these, we store a unique NULLS_MARKER at the end of each chain, and when a search fails to find a match, we check if the NULLS marker found was the expected one. If not, the search may not have examined all objects in the target bucket, so it is repeated. The unique NULLS_MARKER is derived from the address of the head of the chain. As this cannot be derived at load-time the static rhnull in rht_bucket_nested() needs to be initialised at run time. Any caller of a lookup function must still be prepared for the possibility that the object returned is in a different table - it might have been there for some time. Note that this does NOT provide support for other uses of NULLS_MARKERs such as allocating with SLAB_TYPESAFE_BY_RCU or changing the key of an object and re-inserting it in the same table. These could only be done safely if new objects were inserted at the *start* of a hash chain, and that is not currently the case. Signed-off-by: NeilBrown <neilb@suse.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-12-03l3mdev: add function to retreive upper masterAlexis Bauvin
Existing functions to retreive the l3mdev of a device did not walk the master chain to find the upper master. This patch adds a function to find the l3mdev, even indirect through e.g. a bridge: +----------+ | | | vrf-blue | | | +----+-----+ | | +----+-----+ | | | br-blue | | | +----+-----+ | | +----+-----+ | | | eth0 | | | +----------+ This will properly resolve the l3mdev of eth0 to vrf-blue. Signed-off-by: Alexis Bauvin <abauvin@scaleway.com> Reviewed-by: Amine Kherbouche <akherbouche@scaleway.com> Reviewed-by: David Ahern <dsahern@gmail.com> Tested-by: Amine Kherbouche <akherbouche@scaleway.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-12-03udp_tunnel: add config option to bind to a deviceAlexis Bauvin
UDP tunnel sockets are always opened unbound to a specific device. This patch allow the socket to be bound on a custom device, which incidentally makes UDP tunnels VRF-aware if binding to an l3mdev. Signed-off-by: Alexis Bauvin <abauvin@scaleway.com> Reviewed-by: Amine Kherbouche <akherbouche@scaleway.com> Tested-by: Amine Kherbouche <akherbouche@scaleway.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-12-03devlink: Add 'fw_load_policy' generic parameterShalom Toledo
Many drivers load the device's firmware image during the initialization flow either from the flash or from the disk. Currently this option is not controlled by the user and the driver decides from where to load the firmware image. 'fw_load_policy' gives the ability to control this option which allows the user to choose between different loading policies supported by the driver. This parameter can be useful while testing and/or debugging the device. For example, testing a firmware bug fix. Signed-off-by: Shalom Toledo <shalomt@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-12-03dmaengine: pxa: make the filter function internalRobert Jarzmik
As the pxa architecture and all its related drivers do not rely anymore on the filter function, thanks to the slave map conversion, make pxad_filter_fn() static, and remove it from the global namespace. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Acked-by: Vinod Koul <vkoul@kernel.org>
2018-12-03Merge tag 'qcom-drivers-for-4.21' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux into next/drivers Qualcomm ARM Based Driver Updates for v4.21 * Fix llcc license, includes, and error checks * Remove use of memcpy in cmd-db and fix API breakage * Add QCS404 compatible to SMD-RPM * Minor fixes for QMI * Add irq clear handling in QCOM Geni SE during init * tag 'qcom-drivers-for-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux: drm: msm: Check cmd_db_read_aux_data() for failure soc: qcom: smd-rpm: Add QCS404 compatible soc: qcom: llcc-slice: Remove duplicated include from llcc-slice.c soc: qcom: cmd-db: Stop memcpy()ing in cmd_db_read_aux_data() soc: qcom: cmd-db: Remove memcpy()ing from cmd_db_get_header() soc: qcom: Drop help text for QCOM_QMI_HELPERS soc: qcom: qmi_interface: Limit txn ids to U16_MAX soc: qcom: llcc-slice: Add error checks for API functions soc: qcom/llcc: add MODULE_LICENSE tag soc: qcom: Add irq clear handling during SE init Signed-off-by: Olof Johansson <olof@lixom.net>
2018-12-03Merge tag 'arm-soc/for-4.21/drivers' of https://github.com/Broadcom/stblinux ↵Olof Johansson
into next/drivers This pull request contains Broadcom ARM/ARM64/MIPS SoCs drivers changes for 4.21, please pull the following changes: - James fixes the firmware interface after a commit changed the use of VLA and broke large transfers - Stefan adds a timeout check for Raspberry Pi firmware transactions and updates a bunch of SoC/firmware files to use SPDX tags - Wolfram switches the GISB bus arbiter to use dev_get_drvdata() - Yangtao provides a fix for a reference leak due to a call to of_find_node_by_path() - Florian fixes the CPU re-entry point out of S3 suspend with kernels built in Thumb2 mode * tag 'arm-soc/for-4.21/drivers' of https://github.com/Broadcom/stblinux: soc: bcm: brcmstb: Don't leak device tree node reference firmware: raspberrypi: Switch to SPDX identifier firmware: raspberrypi: Fix firmware calls with large buffers soc: bcm: Switch raspberrypi-power to SPDX identifier firmware: raspberrypi: Define timeout for transactions bus: brcmstb_gisb: simplify getting .driver_data soc: bcm: brcmstb: Fix re-entry point with a THUMB2_KERNEL Signed-off-by: Olof Johansson <olof@lixom.net>
2018-12-03bpf: fix documentation for eBPF helpersQuentin Monnet
The missing indentation on the "Return" sections for bpf_map_pop_elem() and bpf_map_peek_elem() helpers break RST and man pages generation. This patch fixes them, and moves the description of those two helpers towards the end of the list (even though they are somehow related to the three first helpers for maps, the man page explicitly states that the helpers are sorted in chronological order). While at it, bring other minor formatting edits for eBPF helpers documentation: mostly blank lines removal, RST formatting, or other small nits for consistency. Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com> Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-12-03bpf: allow BPF read access to qdisc pkt_lenPetar Penkov
The pkt_len field in qdisc_skb_cb stores the skb length as it will appear on the wire after segmentation. For byte accounting, this value is more accurate than skb->len. It is computed on entry to the TC layer, so only valid there. Allow read access to this field from BPF tc classifier and action programs. The implementation is analogous to tc_classid, aside from restricting to read access. To distinguish it from skb->len and self-describe export as wire_len. Changes v1->v2 - Rename pkt_len to wire_len Signed-off-by: Petar Penkov <ppenkov@google.com> Signed-off-by: Vlad Dumitrescu <vladum@google.com> Signed-off-by: Willem de Bruijn <willemb@google.com> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-12-03media: vb2: keep a reference to the request until dqbufHans Verkuil
When vb2_buffer_done is called the buffer is unbound from the request and put. The media_request_object_put also 'put's the request reference. If the application has already closed the request fd, then that means that the request reference at that point goes to 0 and the whole request is released. This means that the control handler associated with the request is also freed and that causes this kernel oops: [174705.995401] BUG: sleeping function called from invalid context at kernel/locking/mutex.c:908 [174705.995411] in_atomic(): 1, irqs_disabled(): 1, pid: 28071, name: vivid-000-vid-o [174705.995416] 2 locks held by vivid-000-vid-o/28071: [174705.995420] #0: 000000001ea3a232 (&dev->mutex#3){....}, at: vivid_thread_vid_out+0x3f5/0x550 [vivid] [174705.995447] #1: 00000000e30a0d1e (&(&q->done_lock)->rlock){....}, at: vb2_buffer_done+0x92/0x1d0 [videobuf2_common] [174705.995460] Preemption disabled at: [174705.995461] [<0000000000000000>] (null) [174705.995472] CPU: 11 PID: 28071 Comm: vivid-000-vid-o Tainted: G W 4.20.0-rc1-test-no #88 [174705.995476] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 05/19/2017 [174705.995481] Call Trace: [174705.995500] dump_stack+0x46/0x60 [174705.995512] ___might_sleep.cold.79+0xe1/0xf1 [174705.995523] __mutex_lock+0x50/0x8f0 [174705.995531] ? find_held_lock+0x2d/0x90 [174705.995536] ? find_held_lock+0x2d/0x90 [174705.995542] ? find_held_lock+0x2d/0x90 [174705.995564] ? v4l2_ctrl_handler_free.part.13+0x44/0x1d0 [videodev] [174705.995576] v4l2_ctrl_handler_free.part.13+0x44/0x1d0 [videodev] [174705.995590] v4l2_ctrl_request_release+0x1c/0x30 [videodev] [174705.995600] media_request_clean+0x64/0xe0 [media] [174705.995609] media_request_release+0x19/0x40 [media] [174705.995617] vb2_buffer_done+0xef/0x1d0 [videobuf2_common] [174705.995630] vivid_thread_vid_out+0x2c1/0x550 [vivid] [174705.995645] ? vivid_stop_generating_vid_cap+0x1c0/0x1c0 [vivid] [174705.995653] kthread+0x113/0x130 [174705.995659] ? kthread_park+0x80/0x80 [174705.995667] ret_from_fork+0x35/0x40 The vb2_buffer_done function can be called from interrupt context, so anything that sleeps is not allowed. The solution is to increment the request refcount when the buffer is queued and decrement it when the buffer is dequeued. Releasing the request is fine if that happens from VIDIOC_DQBUF. Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-12-03RDMA/restrack: Track ucontextLeon Romanovsky
Add ability to track allocated ib_ucontext, which are limited resource and worth to be visible by users. Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2018-12-03i2c: acpi: Introduce i2c_acpi_get_i2c_resource() helperAndy Shevchenko
Besides current two users one more is coming. Definitely makes sense to introduce a helper. No functional change intended. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Wolfram Sang <wsa@the-dreams.de>
2018-12-03dt-bindings: clock: add imx7ulp clock binding docA.s. Dong
i.MX7ULP Clock functions are under joint control of the System Clock Generation (SCG) modules, Peripheral Clock Control (PCC) modules, and Core Mode Controller (CMC)1 blocks Note IMX7ULP has two clock domains: M4 and A7. This binding doc is only for A7 clock domain. Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: Michael Turquette <mturquette@baylibre.com> Cc: Shawn Guo <shawnguo@kernel.org> Cc: Anson Huang <Anson.Huang@nxp.com> Cc: Bai Ping <ping.bai@nxp.com> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2018-12-03clk: fractional-divider: add CLK_FRAC_DIVIDER_ZERO_BASED flag supportA.s. Dong
Adding CLK_FRAC_DIVIDER_ZERO_BASED flag to indicate the numerator and denominator value in register are start from 0. This can be used to support frac dividers like below: Divider output clock = Divider input clock x [(frac +1) / (div +1)] where frac/div in register is: 000b - Divide by 1. 001b - Divide by 2. 010b - Divide by 3. Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: Michael Turquette <mturquette@baylibre.com> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2018-12-03Merge tag 'media/v4.20-4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media fixes from Mauro Carvalho Chehab: - Revert a dt-bindings patch whose driver didn't make for 4.20 - fix a kernel oops at vicodec driver - fix a frame overflow at gspca with was causing regressions on some cameras, making them to not work - use the proper type for wait_queue head - make media request API compatible with 32-bit userspace on 64-bit kernel - fix a regression on Kernel 4.19 at dvb-pll - don't use SPDX headers yet for GFDL * tag 'media/v4.20-4' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: media: mediactl docs: Fix licensing message media: dvb-pll: don't re-validate tuner frequencies media: dvb-pll: fix tuner frequency ranges media: Revert "media: dt-bindings: Document the Rockchip VPU bindings" media: gspca: fix frame overflow error media: vicodec: fix memchr() kernel oops media: cedrus: add action item to the TODO media: media-request: Add compat ioctl media: Use wait_queue_head_t for media_request
2018-12-03media: v4l: Add 4bpp packed depth confidence format CNF4Sergey Dorodnicov
Adding new fourcc CNF4 for 4 bit-per-pixel packed depth confidence information provided by Intel RealSense cameras. Every two consecutive pixels are packed into a single byte. Signed-off-by: Sergey Dorodnicov <sergey.dorodnicov@intel.com> Signed-off-by: Evgeni Raikhel <evgeni.raikhel@intel.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-12-03media: xilinx: Use SPDX-License-IdentifierDhaval Shah
SPDX-License-Identifier is used for the Xilinx Video IP and related drivers. [Added drivers/media/platform/xilinx/Kconfig] [Added drivers/media/platform/xilinx/Makefile] [Added include/dt-bindings/media/xilinx-vip.h] Signed-off-by: Dhaval Shah <dhaval23031987@gmail.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-12-03dt-bindings: Add binding for i.MX8MQ CCMLucas Stach
This adds the binding for the i.MX8MQ Clock Controller Module. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Abel Vesa <abel.vesa@nxp.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2018-12-03dt-bindings: clock: Introduce QCOM LPASS clock bindingsTaniya Das
Add device tree bindings for Low Power Audio subsystem clock controller for Qualcomm Technology Inc's SDM845 SoCs. Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Taniya Das <tdas@codeaurora.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2018-12-03spi: add support for octal mode I/O data transferYogesh Narayan Gaur
Add flags for Octal mode I/O data transfer Required for the SPI controller which can do the data transfer (TX/RX) on 8 data lines e.g. NXP FlexSPI controller. SPI_TX_OCTAL: transmit with 8 wires SPI_RX_OCTAL: receive with 8 wires Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com> Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-12-03RDMA/uverbs: Use only attrs for the write() handler signatureJason Gunthorpe
All of the old arguments can be derived from the uverbs_attr_bundle structure, so get rid of the redundant arguments. Most of the prior work has been removing users of the arguments to allow this to be a simple patch. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2018-12-03RDMA/uverbs: Use uverbs_attr_bundle to pass ucore for write/write_exJason Gunthorpe
This creates a consistent way to access the two core buffers across write and write_ex handlers. Remove the open coded ucore conversion in the write/ex compatibility handlers. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2018-12-03dma-buf: add dma_fence_get_stubChristian König
Extract of useful code from the timeline work. This provides a function to return a stub or dummy fence which is always signaled. Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Chunming Zhou <david1.zhou@amd.com> Link: https://patchwork.freedesktop.org/patch/265248/
2018-12-03sysfs: constify sysfs create/remove files harderJani Nikula
Let the passed in array be const (and thus placed in rodata) instead of a mutable array of const pointers. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20181004143750.30880-1-jani.nikula@intel.com
2018-12-03ASoC: Intel: common: add ACPI matching tables for ICLPierre-Louis Bossart
Entry needed for ICL RVP w/ RT274 Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-12-03sched: Fix various typos in commentsIngo Molnar
Go over the scheduler source code and fix common typos in comments - and a typo in an actual variable name. No change in functionality intended. Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
generated by cgit (git 2.34.1) at 2025-09-14 11:51:33 +0000