Re: [PATCH] android: fix warning when releasing active sync point

Frank Binns
2015-12-15T13:50:22Z

Is this not the issue fixed by 8e43c9c75?

Thanks
Frank

On 15/12/15 13:30, Gustavo Padovan wrote:
> 2015-12-14 Dmitry Torokhov <dtor@chromium.org>:
>
>> Userspace can close the sync device while there are still active fence
>> points, in which case kernel produces the following warning:
>>
>> [ 43.853176] ------------[ cut here ]------------
>> [ 43.857834] WARNING: CPU: 0 PID: 892 at /mnt/host/source/src/third_party/kernel/v3.18/drivers/staging/android/sync.c:439 android_fence_release+0x88/0x104()
>> [ 43.871741] CPU: 0 PID: 892 Comm: Binder_5 Tainted: G U 3.18.0-07661-g0550ce9 #1
>> [ 43.880176] Hardware name: Google Tegra210 Smaug Rev 1+ (DT)
>> [ 43.885834] Call trace:
>> [ 43.888294] [<ffffffc000207464>] dump_backtrace+0x0/0x10c
>> [ 43.893697] [<ffffffc000207580>] show_stack+0x10/0x1c
>> [ 43.898756] [<ffffffc000ab1258>] dump_stack+0x74/0xb8
>> [ 43.903814] [<ffffffc00021d414>] warn_slowpath_common+0x84/0xb0
>> [ 43.909736] [<ffffffc00021d530>] warn_slowpath_null+0x14/0x20
>> [ 43.915482] [<ffffffc00088aefc>] android_fence_release+0x84/0x104
>> [ 43.921582] [<ffffffc000671cc4>] fence_release+0x104/0x134
>> [ 43.927066] [<ffffffc00088b0cc>] sync_fence_free+0x74/0x9c
>> [ 43.932552] [<ffffffc00088b128>] sync_fence_release+0x34/0x48
>> [ 43.938304] [<ffffffc000317bbc>] __fput+0x100/0x1b8
>> [ 43.943185] [<ffffffc000317cc8>] ____fput+0x8/0x14
>> [ 43.947982] [<ffffffc000237f38>] task_work_run+0xb0/0xe4
>> [ 43.953297] [<ffffffc000207074>] do_notify_resume+0x44/0x5c
>> [ 43.958867] ---[ end trace 5a2aa4027cc5d171 ]---
> This crash report seems to be for a 3.18 kernel. Can you reproduce it
> on upstream kernel as well?
>
> Gustavo
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