Re: [PATCH v2] xhci: Convert xhci_handshake() to use readl_poll_timeout_atomic()

[Raul Rangel]

On Thu, Feb 07, 2019 at 05:48:16PM -0800, Andrey Smirnov wrote:
> Xhci_handshake() implements the algorithm already captured by
> readl_poll_timeout_atomic(). Convert the former to use the latter to
> avoid repetition.
> 
> Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
Tested-by: Raul E Rangel <rrangel@xxxxxxxxxxxx>
Reviewed-by: Raul E Rangel <rrangel@xxxxxxxxxxxx>

This fixes a bug on the AMD Stoneyridge platform. usleep(1) sometimes
takes over 10ms. This means a 5 second timeout can easily take over 15
seconds which will trigger the watchdog and reboot the system.

Thanks for the patch.