Re: [PATCH v2 0/2] NVIDIA Tegra I2C synchronization correction

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Tue, Mar 24, 2020 at 10:12:15PM +0300, Dmitry Osipenko wrote:
> Hello,
> 
> Recently I found a way to reliably reproduce I2C timeouts that happen due
> to improper synchronizations made by the I2C driver. It's quite easy to
> reproduce the problem when memory is running on a lower freq + there is
> some memory activity + CPU could get busy for a significant time. This
> is the case when KASAN is enabled and CPU is busy while accessing FS via
> NFS. This small series addresses the found problems.
> 
> Changelog:
> 
> v2: - The "Better handle case where CPU0 is busy for a long time" patch
>       now preserves the old behavior where completion is checked after
>       disabling the interrupt, preventing potential race-condition of
>       the completion awaiting vs interrupt syncing.
> 
> Dmitry Osipenko (2):
>   i2c: tegra: Better handle case where CPU0 is busy for a long time
>   i2c: tegra: Synchronize DMA before termination

Patches look good to me. I tend to apply them to for-current instead of
for-next because they are fixing issues. Even a stable tag?

Attachment: signature.asc
Description: PGP signature


[Index of Archives]     [Linux GPIO]     [Linux SPI]     [Linux Hardward Monitoring]     [LM Sensors]     [Linux USB Devel]     [Linux Media]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux