Re: [PATCH v2] i2c: sprd: use a specific timeout to avoid system hang up issue

[Chunyan Zhang]

On Tue, 5 Jan 2021 at 02:24, Wolfram Sang <wsa@xxxxxxxxxx> wrote:
>
> On Mon, Dec 14, 2020 at 12:58:50PM +0800, Chunyan Zhang wrote:
> > From: Chunyan Zhang <chunyan.zhang@xxxxxxxxxx>
> >
> > If the i2c device SCL bus being pulled up due to some exception before
> > message transfer done, the system cannot receive the completing interrupt
> > signal any more, it would not exit waiting loop until MAX_SCHEDULE_TIMEOUT
> > jiffies eclipse, that would make the system seemed hang up. To avoid that
> > happen, this patch adds a specific timeout for message transfer.
> >
> > Fixes: 8b9ec0719834 ("i2c: Add Spreadtrum I2C controller driver")
> > Signed-off-by: Linhua Xu <linhua.xu@xxxxxxxxxx>
> > Signed-off-by: Chunyan Zhang <chunyan.zhang@xxxxxxxxxx>
>
> Took the liberty to change the errno to ETIMEDOUT and applied to
> for-current, thanks!

Thanks!

Chunyan

>