On Thu, 11 Feb 2021 at 20:36, Greg Kroah-Hartman gregkh@linuxfoundation.org wrote:
This is the start of the stable review cycle for the 4.19.176 release. There are 24 patches in this series, all will be posted as a response to this one. If anyone has any issues with these being applied, please let me know.
Responses should be made by Sat, 13 Feb 2021 15:01:39 +0000. Anything received after that time might be too late.
The whole patch series can be found in one patch at: https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.19.176-rc... or in the git tree and branch at: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y and the diffstat can be found below.
thanks,
greg k-h
The following lockdep noticed on the arm beaglebone x15 device. I have not bisected this problem yet. Suspecting this patch,
David Collins collinsd@codeaurora.org regulator: core: avoid regulator_resolve_supply() race condition
[ 2.470568] WARNING: possible recursive locking detected [ 2.470580] 4.19.176-rc1 #1 Not tainted [ 2.470590] -------------------------------------------- [ 2.470600] swapper/0/1 is trying to acquire lock: [ 2.470611] (ptrval) (&rdev->mutex){+.+.}, at: regulator_enable+0x44/0x20c [ 2.470639] [ 2.470639] but task is already holding lock: [ 2.470650] (ptrval) (&rdev->mutex){+.+.}, at: regulator_lock_nested+0x28/0x88 [ 2.470676] [ 2.470676] other info that might help us debug this: [ 2.470687] Possible unsafe locking scenario: [ 2.470687] [ 2.470698] CPU0 [ 2.470707] ---- [ 2.470716] lock(&rdev->mutex); [ 2.470728] lock(&rdev->mutex); [ 2.470740] [ 2.470740] *** DEADLOCK *** [ 2.470740] [ 2.470752] May be due to missing lock nesting notation [ 2.470752] [ 2.470765] 2 locks held by swapper/0/1: [ 2.470774] #0: (ptrval) (&dev->mutex){....}, at: __driver_attach+0x78/0x168 [ 2.470797] #1: (ptrval) (&rdev->mutex){+.+.}, at: regulator_lock_nested+0x28/0x88 [ 2.470820] [ 2.470820] stack backtrace: [ 2.470836] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.19.176-rc1 #1 [ 2.470846] Hardware name: Generic DRA74X (Flattened Device Tree) [ 2.470871] [<c0416430>] (unwind_backtrace) from [<c040f920>] (show_stack+0x20/0x24) [ 2.470891] [<c040f920>] (show_stack) from [<c1306bec>] (dump_stack+0xe8/0x114) [ 2.470910] [<c1306bec>] (dump_stack) from [<c04c2a04>] (__lock_acquire+0x7cc/0x1acc) [ 2.470925] [<c04c2a04>] (__lock_acquire) from [<c04c46ec>] (lock_acquire+0xdc/0x238) [ 2.470941] [<c04c46ec>] (lock_acquire) from [<c130a008>] (__mutex_lock+0xa0/0xaf4) [ 2.470958] [<c130a008>] (__mutex_lock) from [<c130aa88>] (mutex_lock_nested+0x2c/0x34) [ 2.470974] [<c130aa88>] (mutex_lock_nested) from [<c0ae9434>] (regulator_enable+0x44/0x20c) [ 2.470990] [<c0ae9434>] (regulator_enable) from [<c0ae9780>] (regulator_resolve_supply+0x184/0x2c8) [ 2.471006] [<c0ae9780>] (regulator_resolve_supply) from [<c0ae98e8>] (regulator_register_resolve_supply+0x24/0x8c) [ 2.471022] [<c0ae98e8>] (regulator_register_resolve_supply) from [<c0c294f0>] (class_for_each_device+0x70/0xe8) [ 2.471037] [<c0c294f0>] (class_for_each_device) from [<c0aea368>] (regulator_register+0xa18/0xc58) [ 2.471053] [<c0aea368>] (regulator_register) from [<c0aebd64>] (devm_regulator_register+0x54/0x84) [ 2.471069] [<c0aebd64>] (devm_regulator_register) from [<c0af8c28>] (pbias_regulator_probe+0x1f4/0x2d0) [ 2.471084] [<c0af8c28>] (pbias_regulator_probe) from [<c0c29da0>] (platform_drv_probe+0x58/0xa8) [ 2.471101] [<c0c29da0>] (platform_drv_probe) from [<c0c273b8>] (really_probe+0x310/0x418) [ 2.471119] [<c0c273b8>] (really_probe) from [<c0c276e4>] (driver_probe_device+0x88/0x1dc) [ 2.471135] [<c0c276e4>] (driver_probe_device) from [<c0c27984>] (__driver_attach+0x14c/0x168) [ 2.471150] [<c0c27984>] (__driver_attach) from [<c0c24e08>] (bus_for_each_dev+0x84/0xc4) [ 2.471167] [<c0c24e08>] (bus_for_each_dev) from [<c0c26a18>] (driver_attach+0x2c/0x30) [ 2.471184] [<c0c26a18>] (driver_attach) from [<c0c26380>] (bus_add_driver+0x1d0/0x274) [ 2.471199] [<c0c26380>] (bus_add_driver) from [<c0c28a4c>] (driver_register+0x84/0x118) [ 2.471213] [<c0c28a4c>] (driver_register) from [<c0c29cf0>] (__platform_driver_register+0x50/0x58) [ 2.471231] [<c0c29cf0>] (__platform_driver_register) from [<c1ca3174>] (pbias_regulator_driver_init+0x24/0x28) [ 2.471249] [<c1ca3174>] (pbias_regulator_driver_init) from [<c0403a68>] (do_one_initcall+0xa0/0x394) [ 2.471268] [<c0403a68>] (do_one_initcall) from [<c1c01454>] (kernel_init_freeable+0x3ec/0x484) [ 2.471283] [<c1c01454>] (kernel_init_freeable) from [<c1306ff4>] (kernel_init+0x18/0x128) [ 2.471299] [<c1306ff4>] (kernel_init) from [<c04010ac>] (ret_from_fork+0x14/0x28) [ 2.471310] Exception stack(0xee19bfb0 to 0xee19bff8) [ 2.471323] bfa0: 00000000 00000000 00000000 00000000 [ 2.471336] bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 2.471348] bfe0: 00000000 00000000 00000000 00000000 00000013 00000000 [ 2.471385] vtt_fixed: supplied by smps3
test log link, https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-4.19.y/build/v4.19....
metadata: git branch: linux-4.19.y git repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git git commit: 30e16c3fd5acd42264d873aacb75891f3cd202c4 git describe: v4.19.175-25-g30e16c3fd5ac make_kernelversion: 4.19.176-rc1 kernel-config: http://snapshots.linaro.org/openembedded/lkft/lkft/sumo/am57xx-evm/lkft/linu...