[alsa-devel] [PATCH] ALSA : hda - bug fix on return value check when getting supported power states of a codec
tiwai at suse.de
Fri Aug 10 12:11:06 CEST 2012
At Fri, 10 Aug 2012 09:15:51 +0000,
Lin, Mengdong wrote:
> The return value of snd_hda_param_read() is -1 for an error, otherwise it's the supported power states of a codec.
> The supported power states is a 32-bit value. Bit 31 will be set to 1 if the codec supports EPSS, thus making "sup" negative. And the bit 28:5 is reserved as "0".
> So a negative value other than -1 shall be further checked.
> Please refer to High-Definition spec 126.96.36.199 "Supported Power States", thanks!
> Signed-off-by: Mengdong Lin <mengdong.lin at intel.com>
Could you resend in a normal text? It's garbled badly with HTML in
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Also, try to shorten the subject a bit more.
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