[PATCH v2] net: mvmdio: fix interrupt timeout handling

[David Miller]

From: Leigh Brown <leigh at solinno.co.uk>
Date: Thu, 19 Dec 2013 13:09:48 +0000

> This version corrects the whitespace issue.
> 
> orion_mdio_wait_ready uses wait_event_timeout to wait for the
> SMI interrupt to fire.  wait_event_timeout waits for between
> "timeout - 1" and "timeout" jiffies.  In this case a 1ms timeout
> when HZ is 1000 results in a wait of 0 to 1 jiffies, causing
> premature timeouts.
> 
> This fix ensures a minimum timeout of 2 jiffies, ensuring
> wait_event_timeout will always wait at least 1 jiffie.
> 
> Issue reported by Nicolas Schichan.
> 
> Tested-by: Nicolas Schichan <nschichan at freebox.fr>
> Signed-off-by: Leigh Brown <leigh at solinno.co.uk>

Applied, and queued up for -stable.

I wonder how many other wait_event_timeout() users potentially have
this problem.