Messages in this thread | | | Date | Mon, 13 Nov 2017 12:18:02 -0800 | From | Tejun Heo <> | Subject | Re: [PATCH v2] ahci: imx: Handle increased read failures for IMX53 temperature sensor in low frequency mode. |
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On Mon, Nov 13, 2017 at 10:31:01AM +0000, Martyn Welch wrote: > From: Egor Starkov <egor.starkov@ge.com> > > Extended testing has shown that the imx ahci driver sometimes requires > more than the 100 attempts currently alotted in the driver to perform a > successful temperature reading when running at minimum (throttled) CPU > frequency. > > Debugging suggests that the read cycle can take 160 attempts (which given > that the driver averages 80 readings from the ADC equates to one failure > on each read). > > Increase the attempt limit to 200 in order to greatly reduce the > likelihood of the driver failing to perform a temperature reading, > especially at low CPU frequency. > > Signed-off-by: Egor Starkov <egor.starkov@ge.com> > Signed-off-by: Martyn Welch <martyn.welch@collabora.co.uk>
Applied to libata/for-4.15.
Thanks.
-- tejun
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