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

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  Re: [PATCH 2/2] pinctrl: baytrail: Serialize all register access Linus Walleij <linus.walleij@linaro.org> - 2015-08-13 14:30 +0200

#1206775 — Re: [PATCH 2/2] pinctrl: baytrail: Serialize all register access

On Tue, Aug 4, 2015 at 2:03 PM, Mika Westerberg
<mika.westerberg@linux.intel.com> 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@linux.intel.com>

Patch applied.

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

Yours,
Linus Walleij
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