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2020-01-14misc: xilinx_sdfec: fix xsdfec_poll()'s return typeLuc Van Oostenryck
xsdfec_poll() is defined as returning 'unsigned int' but the .poll method is declared as returning '__poll_t', a bitwise type. Fix this by using the proper return type and using the EPOLL constants instead of the POLL ones, as required for __poll_t. CC: Derek Kiernan <derek.kiernan@xilinx.com> CC: Dragan Cvetic <dragan.cvetic@xilinx.com> Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> Acked-by: Dragan Cvetic <dragan.cvetic@xilinx.com> Link: https://lore.kernel.org/r/20191209213655.57985-1-luc.vanoostenryck@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14misc: xilinx_sdfec: add missing __user annotationLuc Van Oostenryck
The second arg of xsdfec_set_order() is a 'void __user *' and this pointer is then used in get_user() which expect a __user pointer. But get_user() can't be used with a void pointer, it a pointer to the effective type. This is done here by casting the argument to a pointer to the effective type but the __user is missing in the cast. Fix this by adding the missing __user in the cast. CC: Derek Kiernan <derek.kiernan@xilinx.com> CC: Dragan Cvetic <dragan.cvetic@xilinx.com> Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> Acked-by: Dragan Cvetic <dragan.cvetic@xilinx.com> Link: https://lore.kernel.org/r/20191209213719.58037-1-luc.vanoostenryck@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14drivers/misc: ti-st: remove redundant assignment to variables i and flagsColin Ian King
The variables i and flags are being initialized with values that are never read. The initializations are redundant and can be removed. Addresses-Coverity: ("Unused value") Signed-off-by: Colin Ian King <colin.king@canonical.com> Link: https://lore.kernel.org/r/20200113123149.187555-1-colin.king@canonical.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14misc: tsl2550: remove redundant initialization to variable rColin Ian King
The variable r is being initialized with a value that is never read and it is being updated later with a new value. Remove the redundant initialization and move the declaration into a deeper code block. Addresses-Coverity: ("Unused value") Signed-off-by: Colin Ian King <colin.king@canonical.com> Link: https://lore.kernel.org/r/20200107175234.121298-1-colin.king@canonical.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14misc: pti: remove redundant assignments to retvalColin Ian King
The variable retval is assigned with a value that is never read and it is re-assigned a new value later on. The assignment is redundant and can be removed. Clean up multiple occurrances of this pattern. Addresses-Coverity: ("Unused value") Signed-off-by: Colin Ian King <colin.king@canonical.com> Link: https://lore.kernel.org/r/20191222222224.732340-1-colin.king@canonical.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14misc: alcor_pci: Add AU6625 to list of supported PCI_IDsRhys Perry
I have added the AU6625 PCI_ID to the list of supported IDs: alcor_pci.c // Added au6625s ID to the array of supported devices alcor_pci.h // Added entry to define the PCI ID Made it fit in with the already submitted code: alcor_pci.c // Added config entry to that matches the one for au6601 >From general usage there seems to be no problems. Signed-off-by: Rhys Perry <rhysperry111@gmail.com> Link: https://lore.kernel.org/r/20191229171824.10308-1-rhysperry111@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14misc: cxl: use mmgrabJulia Lawall
Mmgrab was introduced in commit f1f1007644ff ("mm: add new mmgrab() helper") and most of the kernel was updated to use it. Update a remaining file. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) <smpl> @@ expression e; @@ - atomic_inc(&e->mm_count); + mmgrab(e); </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr> Acked-by: Andrew Donnellan <ajd@linux.ibm.com> Link: https://lore.kernel.org/r/1577634178-22530-2-git-send-email-Julia.Lawall@inria.fr Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14misc: pvpanic: add crash loaded eventzhenwei pi
Some users prefer kdump tools to generate guest kernel dumpfile, at the same time, need a out-of-band kernel panic event. Currently if booting guest kernel with 'crash_kexec_post_notifiers', QEMU will receive PVPANIC_PANICKED event and stop VM. If booting guest kernel without 'crash_kexec_post_notifiers', guest will not call notifier chain. Add PVPANIC_CRASH_LOADED bit for pvpanic event, it means that guest kernel actually hit a kernel panic, but the guest kernel wants to handle by itself. Signed-off-by: zhenwei pi <pizhenwei@bytedance.com> Link: https://lore.kernel.org/r/20200102023513.318836-3-pizhenwei@bytedance.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14misc: pvpanic: move bit definition to uapi header filezhenwei pi
Some processes outside of the kernel(Ex, QEMU) should know what the value really is for, so move the bit definition to a uapi file. Suggested-by: Greg KH <gregkh@linuxfoundation.org> Signed-off-by: zhenwei pi <pizhenwei@bytedance.com> Link: https://lore.kernel.org/r/20200102023513.318836-2-pizhenwei@bytedance.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14misc: rtsx: Fix impossible conditionRui Feng
A u8 can only go up to 255, condition n > 396 is impossible, so change u8 to u16. Signed-off-by: Rui Feng <rui_feng@realsil.com.cn> Link: https://lore.kernel.org/r/1574214006-13540-1-git-send-email-rui_feng@realsil.com.cn Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14misc: isl29020: add missed pm_runtime_disableChuhong Yuan
The driver forgets to call pm_runtime_disable in remove. Add the missed call to fix it. Signed-off-by: Chuhong Yuan <hslester96@gmail.com> Link: https://lore.kernel.org/r/20191118080931.30749-1-hslester96@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14misc: genwqe: fix compile warningsHongbo Yao
Using the following command will get compile warnings: make W=1 drivers/misc/genwqe/card_ddcb.o ARCH=x86_64 drivers/misc/genwqe/card_ddcb.c: In function setup_ddcb_queue: drivers/misc/genwqe/card_ddcb.c:1024:6: warning: variable rc set but not used [-Wunused-but-set-variable] drivers/misc/genwqe/card_ddcb.c: In function genwqe_card_thread: drivers/misc/genwqe/card_ddcb.c:1190:23: warning: variable rc set but not used [-Wunused-but-set-variable] Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Hongbo Yao <yaohongbo@huawei.com> Link: https://lore.kernel.org/r/20191205111655.170382-1-yaohongbo@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14bus: fsl-mc: properly empty-initialize structureIoana Ciornei
Use the proper form of the empty initializer when working with structures that contain an array. Otherwise, older gcc versions (eg gcc 4.9) will complain about this. Fixes: 1ac210d128ef ("bus: fsl-mc: add the fsl_mc_get_endpoint function") Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com> Acked-by: Laurentiu Tudor <laurentiu.tudor@nxp.com> Link: https://lore.kernel.org/r/20191204142950.30206-1-ioana.ciornei@nxp.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14drivers/misc: sram-exec: have the callers of set_memory_*() check the return ↵Tianlin Li
value Right now several architectures allow their set_memory_*() family of functions to fail, but callers may not be checking the return values. If set_memory_*() returns with an error, call-site assumptions may be infact wrong to assume that it would either succeed or not succeed at all. Ideally, the failure of set_memory_*() should be passed up the call stack, and callers should examine the failure and deal with it. Need to fix the callers and add the __must_check attribute. They also may not provide any level of atomicity, in the sense that the memory protections may be left incomplete on failure. This issue likely has a few steps on effects architectures: 1) Have all callers of set_memory_*() helpers check the return value. 2) Add __must_check to all set_memory_*() helpers so that new uses do not ignore the return value. 3) Add atomicity to the calls so that the memory protections aren't left in a partial state. This series is part of step 1. Make sram driver check the return value of set_memory_*(). Signed-off-by: Tianlin Li <tli@digitalocean.com> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20191217194528.16461-1-tli@digitalocean.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14staging: rtl8188eu: cleanup whitespace in rtl8188e_dm.cMichael Straube
Replace tabs with spaces and/or remove spaces to use typical kernel horizontal whitespace. Signed-off-by: Michael Straube <straube.linux@gmail.com> Link: https://lore.kernel.org/r/20200114134422.13598-5-straube.linux@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14staging: rtl8188eu: remove unnecessary parentheses in rtl8188e_dm.cMichael Straube
Remove unnecessary parentheses reported by checkpatch. Signed-off-by: Michael Straube <straube.linux@gmail.com> Link: https://lore.kernel.org/r/20200114134422.13598-4-straube.linux@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14staging: rtl8188eu: cleanup long lines in rtl8188e_dm.cMichael Straube
Cleanup lines over 80 characters in rtl8188e_dm.c by adding appropriate line breaks. Signed-off-by: Michael Straube <straube.linux@gmail.com> Link: https://lore.kernel.org/r/20200114134422.13598-3-straube.linux@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14staging: rtl8188eu: convert rtw_hal_antdiv_before_linked() to boolMichael Straube
Function rtw_hal_antdiv_before_linked() returns boolean values, so change the return type from u8 to bool. Signed-off-by: Michael Straube <straube.linux@gmail.com> Link: https://lore.kernel.org/r/20200114134422.13598-2-straube.linux@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14staging: rtl8188eu: refactor rtw_hal_antdiv_before_linked()Michael Straube
Refactor rtw_hal_antdiv_before_linked() to clear checkpatch warnings. WARNING: line over 80 characters WARNING: else is not generally useful after a break or return Signed-off-by: Michael Straube <straube.linux@gmail.com> Link: https://lore.kernel.org/r/20200114134422.13598-1-straube.linux@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14staging: rtl8723bs: remove ODM_GetRightChnlPlaceforIQK()Michael Straube
Function ODM_GetRightChnlPlaceforIQK() returns non-zero values only for channels > 14. According to the TODO code valid only for 5 GHz should be removed. - find and remove remaining code valid only for 5 GHz. Most of the obvious ones have been removed, but things like channel > 14 still exist. Remove ODM_GetRightChnlPlaceforIQK() and replace the uses of the return value with zero. Signed-off-by: Michael Straube <straube.linux@gmail.com> Link: https://lore.kernel.org/r/20200110210456.13178-1-straube.linux@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14staging: exfat: Fix alignment warningsPragat Pandya
Fix checkpatch warning "Alignment should match open parenthesis". Signed-off-by: Pragat Pandya <pragat.pandya@gmail.com> Link: https://lore.kernel.org/r/20200111142233.11354-1-pragat.pandya@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14staging: rtl8188eu: remove unused parameters from rtw_check_network_typeMichael Straube
Parameters 'ratelen' and 'channel' of function rtw_check_network_type are unused, remove them. Reduces object file size by 62 bytes. text data bss dec hex filename 398525 12896 4688 416109 6596d drivers/staging/rtl8188eu/r8188eu.o 398463 12896 4688 416047 6592f drivers/staging/rtl8188eu/r8188eu.o Signed-off-by: Michael Straube <straube.linux@gmail.com> Link: https://lore.kernel.org/r/20200113212939.9738-1-straube.linux@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14Bluetooth: hci_qca: Add qca_power_on() API to support both wcn399x and Rome ↵Rocky Liao
power up This patch adds a unified API qca_power_on() to support both wcn399x and Rome power on. For wcn399x it calls the qca_wcn3990_init() to init the regulators, and for Rome it pulls up the bt_en GPIO to power up the btsoc. It also moves all the power up operation from hdev->open() to hdev->setup(). Signed-off-by: Rocky Liao <rjliao@codeaurora.org> Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2020-01-14tty: synclink_gt: Adjust indentation in several functionsNathan Chancellor
Clang warns: ../drivers/tty/synclink_gt.c:1337:3: warning: misleading indentation; statement is not part of the previous 'if' [-Wmisleading-indentation] if (C_CRTSCTS(tty)) { ^ ../drivers/tty/synclink_gt.c:1335:2: note: previous statement is here if (I_IXOFF(tty)) ^ ../drivers/tty/synclink_gt.c:2563:3: warning: misleading indentation; statement is not part of the previous 'if' [-Wmisleading-indentation] if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty)) ^ ../drivers/tty/synclink_gt.c:2561:2: note: previous statement is here if (I_INPCK(info->port.tty)) ^ ../drivers/tty/synclink_gt.c:3221:3: warning: misleading indentation; statement is not part of the previous 'else' [-Wmisleading-indentation] set_signals(info); ^ ../drivers/tty/synclink_gt.c:3219:2: note: previous statement is here else ^ 3 warnings generated. The indentation on these lines is not at all consistent, tabs and spaces are mixed together. Convert to just using tabs to be consistent with the Linux kernel coding style and eliminate these warnings from clang. Link: https://github.com/ClangBuiltLinux/linux/issues/822 Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Link: https://lore.kernel.org/r/20191218023912.13827-1-natechancellor@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14tty: synclinkmp: Adjust indentation in several functionsNathan Chancellor
Clang warns: ../drivers/tty/synclinkmp.c:1456:3: warning: misleading indentation; statement is not part of the previous 'if' [-Wmisleading-indentation] if (C_CRTSCTS(tty)) { ^ ../drivers/tty/synclinkmp.c:1453:2: note: previous statement is here if (I_IXOFF(tty)) ^ ../drivers/tty/synclinkmp.c:2473:8: warning: misleading indentation; statement is not part of the previous 'if' [-Wmisleading-indentation] info->port.tty->hw_stopped = 0; ^ ../drivers/tty/synclinkmp.c:2471:7: note: previous statement is here if ( debug_level >= DEBUG_LEVEL_ISR ) ^ ../drivers/tty/synclinkmp.c:2482:8: warning: misleading indentation; statement is not part of the previous 'if' [-Wmisleading-indentation] info->port.tty->hw_stopped = 1; ^ ../drivers/tty/synclinkmp.c:2480:7: note: previous statement is here if ( debug_level >= DEBUG_LEVEL_ISR ) ^ ../drivers/tty/synclinkmp.c:2809:3: warning: misleading indentation; statement is not part of the previous 'if' [-Wmisleading-indentation] if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty)) ^ ../drivers/tty/synclinkmp.c:2807:2: note: previous statement is here if (I_INPCK(info->port.tty)) ^ ../drivers/tty/synclinkmp.c:3246:3: warning: misleading indentation; statement is not part of the previous 'else' [-Wmisleading-indentation] set_signals(info); ^ ../drivers/tty/synclinkmp.c:3244:2: note: previous statement is here else ^ 5 warnings generated. The indentation on these lines is not at all consistent, tabs and spaces are mixed together. Convert to just using tabs to be consistent with the Linux kernel coding style and eliminate these warnings from clang. Link: https://github.com/ClangBuiltLinux/linux/issues/823 Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Link: https://lore.kernel.org/r/20191218024720.3528-1-natechancellor@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14ttyprintk: fix a potential deadlock in interrupt context issueZhenzhong Duan
tpk_write()/tpk_close() could be interrupted when holding a mutex, then in timer handler tpk_write() may be called again trying to acquire same mutex, lead to deadlock. Google syzbot reported this issue with CONFIG_DEBUG_ATOMIC_SLEEP enabled: BUG: sleeping function called from invalid context at kernel/locking/mutex.c:938 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 0, name: swapper/1 1 lock held by swapper/1/0: ... Call Trace: <IRQ> dump_stack+0x197/0x210 ___might_sleep.cold+0x1fb/0x23e __might_sleep+0x95/0x190 __mutex_lock+0xc5/0x13c0 mutex_lock_nested+0x16/0x20 tpk_write+0x5d/0x340 resync_tnc+0x1b6/0x320 call_timer_fn+0x1ac/0x780 run_timer_softirq+0x6c3/0x1790 __do_softirq+0x262/0x98c irq_exit+0x19b/0x1e0 smp_apic_timer_interrupt+0x1a3/0x610 apic_timer_interrupt+0xf/0x20 </IRQ> See link https://syzkaller.appspot.com/bug?extid=2eeef62ee31f9460ad65 for more details. Fix it by using spinlock in process context instead of mutex and having interrupt disabled in critical section. Reported-by: syzbot+2eeef62ee31f9460ad65@syzkaller.appspotmail.com Signed-off-by: Zhenzhong Duan <zhenzhong.duan@gmail.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://lore.kernel.org/r/20200113034842.435-1-zhenzhong.duan@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14MAINTAINERS: Add myself as maintainer of ehv_bytechan tty driverLaurentiu Tudor
Michael Ellerman made a call for volunteers from NXP to maintain this driver and I offered myself. Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com> Acked-by: Timur Tabi <timur@kernel.org> Link: https://lore.kernel.org/r/20200114110012.17351-1-laurentiu.tudor@nxp.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14serial: xilinx_uartps: set_mctrl sets RTS and DTRMaarten Brock
set_mctrl now sets RTS and DTR. Signed-off-by: Maarten Brock <m.brock@vanmierlo.com> Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> Link: https://lore.kernel.org/r/1574687731-21563-3-git-send-email-shubhrajyoti.datta@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14serial: xilinx_uartps: set_termios sets flowcontrolMaarten Brock
Let set_termios enable/disable automatic flow control. set_mctrl should not touch automatic flow control. Signed-off-by: Maarten Brock <m.brock@vanmierlo.com> Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> Link: https://lore.kernel.org/r/1574687731-21563-2-git-send-email-shubhrajyoti.datta@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14serial: xilinx_uartps: Let get_mctrl return statusMaarten Brock
Some of the applications like microcom do not work if modem is disabled. To fix them we always return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR instead of 0 when using cts_override. Make get_mctrl return actual status when not using cts_override. Signed-off-by: Maarten Brock <m.brock@vanmierlo.com> Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> Link: https://lore.kernel.org/r/1574687731-21563-1-git-send-email-shubhrajyoti.datta@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14tty/serial: 8250_exar: use true,false for bool variableZheng Bin
Fixes coccicheck warning: drivers/tty/serial/8250/8250_exar.c:189:6-17: WARNING: Assignment of 0/1 to bool variable drivers/tty/serial/8250/8250_exar.c:197:3-14: WARNING: Assignment of 0/1 to bool variable drivers/tty/serial/8250/8250_exar.c:199:3-14: WARNING: Assignment of 0/1 to bool variable Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Zheng Bin <zhengbin13@huawei.com> Link: https://lore.kernel.org/r/1578881777-65475-5-git-send-email-zhengbin13@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14tty/serial: atmel: use true,false for bool variableZheng Bin
Fixes coccicheck warning: drivers/tty/serial/atmel_serial.c:1062:1-23: WARNING: Assignment of 0/1 to bool variable drivers/tty/serial/atmel_serial.c:1261:1-23: WARNING: Assignment of 0/1 to bool variable drivers/tty/serial/atmel_serial.c:1688:3-25: WARNING: Assignment of 0/1 to bool variable Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Zheng Bin <zhengbin13@huawei.com> Link: https://lore.kernel.org/r/1578881777-65475-4-git-send-email-zhengbin13@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14tty/serial: kgdb_nmi: use true,false for bool variableZheng Bin
Fixes coccicheck warning: drivers/tty/serial/kgdb_nmi.c:121:6-13: WARNING: Assignment of 0/1 to bool variable drivers/tty/serial/kgdb_nmi.c:133:2-9: WARNING: Assignment of 0/1 to bool variable Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Zheng Bin <zhengbin13@huawei.com> Link: https://lore.kernel.org/r/1578881777-65475-3-git-send-email-zhengbin13@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14tty: synclink_gt: use true,false for bool variableZheng Bin
Fixes coccicheck warning: drivers/tty/synclink_gt.c:2101:3-19: WARNING: Assignment of 0/1 to bool variable Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Zheng Bin <zhengbin13@huawei.com> Link: https://lore.kernel.org/r/1578881777-65475-2-git-send-email-zhengbin13@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14tty: serial: msm_serial: RX SW/FIFO mode fallbackLoic Poulain
During db410c stress test and when the system is low on memory, the UART/console becomes unresponsive and never recover back. This has been narrowed down to the msm_start_rx_dma which does not manage error cases correctly (e.g. dma mapping failure), indeed, when an error happens, dma transfer is simply discarded and so never completed, leading to unconfigured RX path. This patch fixes this issue by switching to SW/FIFO mode in case of DMA issue. This mainly consists in resetting the receiver to apply RX BAM/DMA disabling change and re-enabling the RX level and stale interrupts (previously disabled for DMA transfers). The DMA will be re-enabled once memory is available since the SW/FIFO read function (msm_handle_rx_dm) retries to start dma on completion. Signed-off-by: Loic Poulain <loic.poulain@linaro.org> Link: https://lore.kernel.org/r/1578646684-17379-1-git-send-email-loic.poulain@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14serial: 8250: Support disabling mdelay-filled probes of 16550A variantsJosh Triplett
The 8250 driver can probe for many variants of the venerable 16550A serial port. Some of those probes involve long (20ms) mdelay calls, which delay system boot. Modern systems and virtual machines don't have those variants. Provide a Kconfig option to disable probes for 16550A variants. Disabling this speeds up the boot of a virtual machine with a serial console by more than 20ms (a substantial fraction of the ~100ms needed to boot a carefully configured VM). Before: [ +0.021919] 00:04: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A After: [ +0.000097] 00:04: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A Signed-off-by: Josh Triplett <josh@joshtriplett.org> Link: https://lore.kernel.org/r/20200111022513.GA166267@localhost Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14tty: serial: tegra: Optimize DMA buffer synchronizationDmitry Osipenko
Synchronize only the dirty part of DMA buffer in order to avoid unnecessary overhead of syncing of the clean part, which is the case of every serial DMA transfer in practice. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Link: https://lore.kernel.org/r/20200112180919.5194-3-digetx@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14tty: serial: tegra: Activate RX DMA transfer by requestDmitry Osipenko
This allows DMA engine to go into runtime-suspended mode whenever there is no data to receive, instead of keeping DMA active all the time while TTY is opened (i.e. permanently active in practice, like in the case of UART Bluetooth). Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Link: https://lore.kernel.org/r/20200112180919.5194-2-digetx@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14regulator: vqmmc-ipq4019: Trivial clean upAxel Lin
A few trivial clean up: * Make ipq4019_regulator_voltage_ops and vmmc_regulator const * Make ipq4019_vmmcq_regmap_config static * Use regulator_map_voltage_ascend Signed-off-by: Axel Lin <axel.lin@ingics.com> Link: https://lore.kernel.org/r/20200114065847.31667-2-axel.lin@ingics.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-01-14regulator: vqmmc-ipq4019: Remove ipq4019_regulator_removeAxel Lin
This driver is using devm_regulator_register() so no need to call regulator_unregister() in ipq4019_regulator_remove(). Signed-off-by: Axel Lin <axel.lin@ingics.com> Link: https://lore.kernel.org/r/20200114065847.31667-1-axel.lin@ingics.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-01-14regulator: bindings: Drop document bindings for mpq7920Mark Brown
This reverts commit f5fa59a61eca "regulator: bindings: add document bindings for mpq7920" as Rob has a number of problems with the use of DT schema. Signed-off-by: Mark Brown <broonie@kernel.org>
2020-01-14dt-bindings: Drop entry for Monolithic Power System, MPSMark Brown
This reverts commit 9399e5dc6b679994 adding the entry, Rob has rescinded his ack. Signed-off-by: Mark Brown <broonie@kernel.org>
2020-01-14selftests/timens: Check for right timens offsets after fork and execAndrei Vagin
Output on success: 1..1 ok 1 exec # Pass 1 Fail 0 Xfail 0 Xpass 0 Skip 0 Error 0 Output on failure: 1..1 not ok 1 36016 16 Bail out! Output with lack of permissions: 1..1 not ok 1 # SKIP need to run as root Output without support of time namespaces: 1..1 not ok 1 # SKIP Time namespaces are not supported Co-developed-by: Dmitry Safonov <dima@arista.com> Signed-off-by: Andrei Vagin <avagin@gmail.com> Signed-off-by: Dmitry Safonov <dima@arista.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20191112012724.250792-35-dima@arista.com
2020-01-14selftests/timens: Add a simple perf test for clock_gettime()Andrei Vagin
Output on success: 1..4 ok 1 host: clock: monotonic cycles: 148323947 ok 2 host: clock: boottime cycles: 148577503 ok 3 ns: clock: monotonic cycles: 137659217 ok 4 ns: clock: boottime cycles: 137959154 # Pass 4 Fail 0 Xfail 0 Xpass 0 Skip 0 Error 0 Output with lack of permissions: 1..4 ok 1 host: clock: monotonic cycles: 145671139 ok 2 host: clock: boottime cycles: 146958357 not ok 3 # SKIP need to run as root Output without support of time namespaces: 1..4 ok 1 host: clock: monotonic cycles: 145671139 ok 2 host: clock: boottime cycles: 146958357 not ok 3 # SKIP Time namespaces are not supported Co-developed-by: Dmitry Safonov <dima@arista.com> Signed-off-by: Andrei Vagin <avagin@gmail.com> Signed-off-by: Dmitry Safonov <dima@arista.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20191112012724.250792-34-dima@arista.com
2020-01-14selftests/timens: Add timer offsets testAndrei Vagin
Check that timer_create() takes into account clock offsets. Output on success: 1..3 ok 1 clockid=7 ok 2 clockid=1 ok 3 clockid=9 # Pass 3 Fail 0 Xfail 0 Xpass 0 Skip 0 Error 0 Output with lack of permissions: 1..3 not ok 1 # SKIP need to run as root Output without support of time namespaces: 1..3 not ok 1 # SKIP Time namespaces are not supported Co-developed-by: Dmitry Safonov <dima@arista.com> Signed-off-by: Andrei Vagin <avagin@gmail.com> Signed-off-by: Dmitry Safonov <dima@arista.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20191112012724.250792-33-dima@arista.com
2020-01-14selftests/timens: Add procfs selftestDmitry Safonov
Check that /proc/uptime is correct inside a new time namespace. Output on success: 1..1 ok 1 Passed for /proc/uptime # Pass 1 Fail 0 Xfail 0 Xpass 0 Skip 0 Error 0 Output with lack of permissions: 1..1 not ok 1 # SKIP need to run as root Output without support of time namespaces: 1..1 not ok 1 # SKIP Time namespaces are not supported Co-developed-by: Andrei Vagin <avagin@gmail.com> Signed-off-by: Andrei Vagin <avagin@gmail.com> Signed-off-by: Dmitry Safonov <dima@arista.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20191112012724.250792-32-dima@arista.com
2020-01-14selftests/timens: Add a test for clock_nanosleep()Andrei Vagin
Check that clock_nanosleep() takes into account clock offsets. Output on success: 1..4 ok 1 clockid: 1 abs:0 ok 2 clockid: 1 abs:1 ok 3 clockid: 9 abs:0 ok 4 clockid: 9 abs:1 Output with lack of permissions: 1..4 not ok 1 # SKIP need to run as root Output without support of time namespaces: 1..4 not ok 1 # SKIP Time namespaces are not supported Co-developed-by: Dmitry Safonov <dima@arista.com> Signed-off-by: Andrei Vagin <avagin@gmail.com> Signed-off-by: Dmitry Safonov <dima@arista.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20191112012724.250792-31-dima@arista.com
2020-01-14selftests/timens: Add a test for timerfdAndrei Vagin
Check that timerfd_create() takes into account clock offsets. Output on success: 1..3 ok 1 clockid=7 ok 2 clockid=1 ok 3 clockid=9 # Pass 3 Fail 0 Xfail 0 Xpass 0 Skip 0 Error 0 Output on failure: 1..3 not ok 1 clockid: 7 elapsed: 0 not ok 2 clockid: 1 elapsed: 0 not ok 3 clockid: 9 elapsed: 0 Bail out! Output with lack of permissions: 1..3 not ok 1 # SKIP need to run as root Output without support of time namespaces: 1..3 not ok 1 # SKIP Time namespaces are not supported Co-developed-by: Dmitry Safonov <dima@arista.com> Signed-off-by: Andrei Vagin <avagin@gmail.com> Signed-off-by: Dmitry Safonov <dima@arista.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20191112012724.250792-30-dima@arista.com
2020-01-14selftests/timens: Add Time Namespace test for supported clocksDmitry Safonov
A test to check that all supported clocks work on host and inside a new time namespace. Use both ways to get time: through VDSO and by entering the kernel with implicit syscall. Introduce a new timens directory in selftests framework for the next timens tests. Output on success: 1..10 ok 1 Passed for CLOCK_BOOTTIME (syscall) ok 2 Passed for CLOCK_BOOTTIME (vdso) ok 3 Passed for CLOCK_BOOTTIME_ALARM (syscall) ok 4 Passed for CLOCK_BOOTTIME_ALARM (vdso) ok 5 Passed for CLOCK_MONOTONIC (syscall) ok 6 Passed for CLOCK_MONOTONIC (vdso) ok 7 Passed for CLOCK_MONOTONIC_COARSE (syscall) ok 8 Passed for CLOCK_MONOTONIC_COARSE (vdso) ok 9 Passed for CLOCK_MONOTONIC_RAW (syscall) ok 10 Passed for CLOCK_MONOTONIC_RAW (vdso) # Pass 10 Fail 0 Xfail 0 Xpass 0 Skip 0 Error 0 Output with lack of permissions: 1..10 not ok 1 # SKIP need to run as root Output without support of time namespaces: 1..10 not ok 1 # SKIP Time namespaces are not supported Co-developed-by: Andrei Vagin <avagin@openvz.org> Signed-off-by: Andrei Vagin <avagin@gmail.com> Signed-off-by: Dmitry Safonov <dima@arista.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20191112012724.250792-29-dima@arista.com
2020-01-14fs/proc: Introduce /proc/pid/timens_offsetsAndrei Vagin
API to set time namespace offsets for children processes, i.e.: echo "$clockid $offset_sec $offset_nsec" > /proc/self/timens_offsets Co-developed-by: Dmitry Safonov <dima@arista.com> Signed-off-by: Andrei Vagin <avagin@gmail.com> Signed-off-by: Dmitry Safonov <dima@arista.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20191112012724.250792-28-dima@arista.com
generated by cgit (git 2.34.1) at 2025-09-23 12:20:20 +0000