Messages in this thread | | | Date | Tue, 10 Dec 2013 08:56:14 +0100 | From | Takashi Iwai <> | Subject | Re: [PATCH] ALSA: at73c213: clk_round_rate() can return a zero upon error |
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At Mon, 9 Dec 2013 18:40:48 -0800, Paul Walmsley wrote: > > > Treat both negative and zero return values from clk_round_rate() > as errors. This is needed since subsequent patches will convert > clk_round_rate()'s return value to be an unsigned type, rather > than a signed type, since some clock sources can generate rates higher > than (2^31)-1 Hz. > > Eventually, when calling clk_round_rate(), only a return value of > zero will be considered a error. All other values will be > considered valid rates. The comparison against values less than > 0 is kept to preserve the correct behavior in the meantime. > > Signed-off-by: Paul Walmsley <pwalmsley@nvidia.com> > Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no> > Cc: Takashi Iwai <tiwai@suse.de> > Cc: Jaroslav Kysela <perex@perex.cz> > --- > Applies on v3.13-rc3. See also: > > http://marc.info/?l=linux-arm-kernel&m=138542591313620&w=2
Is the behavior "returning zero upon error" already in 3.13? That is, should this (and another) patch be taken as a 3.13-fix patch, or it's for 3.14?
thanks,
Takashi
> > sound/spi/at73c213.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/sound/spi/at73c213.c b/sound/spi/at73c213.c > index 8e3d9a6c7a3b..25c38afaee49 100644 > --- a/sound/spi/at73c213.c > +++ b/sound/spi/at73c213.c > @@ -174,7 +174,7 @@ static int snd_at73c213_set_bitrate(struct snd_at73c213 *chip) > dac_rate_new = 8 * (ssc_rate / ssc_div); > > status = clk_round_rate(chip->board->dac_clk, dac_rate_new); > - if (status < 0) > + if (status <= 0) > return status; > > /* Ignore difference smaller than 256 Hz. */ >
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