Re: [PATCH 2/2] pinctrl: baytrail: Serialize all register access

From: Linus Walleij
Date: Thu Aug 13 2015 - 08:26:54 EST

On Tue, Aug 4, 2015 at 2:03 PM, Mika Westerberg
<mika.westerberg@xxxxxxxxxxxxxxx> wrote:

> There is a hardware issue in Intel Baytrail where concurrent GPIO register
> access might result reads of 0xffffffff and writes might get dropped
> completely.
> Prevent this from happening by taking the serializing lock in all places
> where it is possible that more than one thread might be accessing the
> hardware concurrently.
> Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>

Patch applied.

Same comment here about the fastpath and the RT raw spinlocks.

Linus Walleij
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at