Re: [PATCH] video: treat signal like timeout as failure

On 20/01/15 07:23, Nicholas Mc Guire wrote:

if(!wait_for_completion_interruptible_timeout(...))
only handles the timeout case - this patch adds handling the
signal case the same as timeout and cleans up.

Signed-off-by: Nicholas Mc Guire <redacted>
---

Only the timeout case was being handled, return of 0 in 
wait_for_completion_interruptible_timeout, the signal case (-ERESTARTSYS)
was treated just like the case of successful completion, which is most 
likely not reasonable.

Note that exynos_mipi_dsi_wr_data/exynos_mipi_dsi_rd_data return values
are not checked at the call sites in s6e8ax0.c (cmd_read/cmd_write)!

This patch simply treats the signal case the same way as the timeout case,
by releasing locks and returning 0 - which might not be the right thing to
do - this needs a review by someone knowing the details of this driver.

While I agree that this patch is a bit better than the current state,
the code still looks wrong as Russell said.

I can merge this, but I'd rather have someone from Samsung look at the
code and change it to use wait_for_completion_killable_timeout() if
that's what this code is really supposed to use.

 Tomi