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| author | Paul Walmsley <pwalmsley@nvidia.com> | 2013-12-09 18:49:13 -0800 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2013-12-10 21:19:49 +0100 |
| commit | 337bb336b95bd7884fa3a194eafbdf52a0216b2e (patch) | |
| tree | a6ae43416ac2e9568c71d3a3feda87acd291904a | |
| parent | f62438ac53ae852eca8e98a5a96742aac41403c7 (diff) | |
| download | linux-337bb336b95bd7884fa3a194eafbdf52a0216b2e.tar.gz linux-337bb336b95bd7884fa3a194eafbdf52a0216b2e.tar.bz2 linux-337bb336b95bd7884fa3a194eafbdf52a0216b2e.zip | |
ALSA: atmel_abdac: clk_round_rate() can return a zero upon error
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>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| -rw-r--r-- | sound/atmel/abdac.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/atmel/abdac.c b/sound/atmel/abdac.c index 872d59e35ee2..b78a3bc6f35e 100644 --- a/sound/atmel/abdac.c +++ b/sound/atmel/abdac.c @@ -354,7 +354,7 @@ static int set_sample_rates(struct atmel_abdac *dac) /* we start at 192 kHz and work our way down to 5112 Hz */ while (new_rate >= RATE_MIN && index < (MAX_NUM_RATES + 1)) { new_rate = clk_round_rate(dac->sample_clk, 256 * new_rate); - if (new_rate < 0) + if (new_rate <= 0) break; /* make sure we are below the ABDAC clock */ if (new_rate <= clk_get_rate(dac->pclk)) { |