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
> There is a hardware issue in Intel Baytrail where concurrent GPIO register
> access might result reads of 0xffffffff and writes might get dropped
> 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>
Same comment here about the fastpath and the RT raw spinlocks.
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