Sun, 28 Oct 2018 22:06:54 +0300 tarihinde Numan Demirdöğen <if.gnu.linux@xxxxxxxxx> yazdı: >Thu, 25 Oct 2018 09:49:03 +0200 tarihinde >Pavel Machek <pavel@xxxxxx> yazdı: > >> Hi! >> >> Here's problem bisected down to: >> >> commit 9d659ae14b545c4296e812c70493bfdc999b5c1c >> Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx> >> Date: Tue Aug 23 14:40:16 2016 +0200 >> >> locking/mutex: Add lock handoff to avoid starvation >> >> Implement lock handoff to avoid lock starvation. >> >> Numan, I assume revert of that patch on the 4.18 kernel still makes >> it work? >> > >Unfortunately, I could not revert >9d659ae14b545c4296e812c70493bfdc999b5c1c on kernels from 4.18.16 to >4.10-rc1 because there were too much conflicts, which I could not solve >as an "average Joe". I tried a3ea3d9b865c2a8f7fe455c7fa26db4b6fd066e3 >which is parent of 9d659ae14b545c4296e812c70493bfdc999b5c1c and >succeeded to compile kernel. > >git checkout a3ea3d9b865c2a8f7fe455c7fa26db4b6fd066e3 > >Then, I compiled kernel and rebooted with it. I tried a couples of >times suspending and resuming, all of the time keyboard worked as >expected. > With this one line patch from Takashi Iwai, keyboard is working as expected after resuming from suspend/hibernate. --- a/kernel/locking/mutex.c +++ b/kernel/locking/mutex.c @@ -59,7 +59,7 @@ EXPORT_SYMBOL(__mutex_init); * Bit2 indicates handoff has been done and we're waiting for pickup. */ #define MUTEX_FLAG_WAITERS 0x01 -#define MUTEX_FLAG_HANDOFF 0x02 +#define MUTEX_FLAG_HANDOFF 0x00 #define MUTEX_FLAG_PICKUP 0x04 #define MUTEX_FLAGS 0x07 Thanks in advance and regards, -- Numan Demirdöğen
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