diff options
| author | Todd Poynor <toddpoynor@google.com> | 2012-07-13 15:30:48 +0900 |
|---|---|---|
| committer | Kukjin Kim <kgene.kim@samsung.com> | 2012-07-13 15:35:04 +0900 |
| commit | 8265981bb439f3ecc5356fb877a6c2a6636ac88a (patch) | |
| tree | c95e3b84c46bcc9d39c1d3d0e98c82ccb8088a7c | |
| parent | bdd3cc26ba651e33780ade33f1410320cf2d0cf4 (diff) | |
ARM: SAMSUNG: fix race in s3c_adc_start for ADC
Checking for adc->ts_pend already claimed should be done with the
lock held.
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Acked-by: Ben Dooks <ben-linux@fluff.org>
Cc: Stable <stable@vger.kernel.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
| -rw-r--r-- | arch/arm/plat-samsung/adc.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/arm/plat-samsung/adc.c b/arch/arm/plat-samsung/adc.c index 33ecd0c9f0c..b1e05ccff3a 100644 --- a/arch/arm/plat-samsung/adc.c +++ b/arch/arm/plat-samsung/adc.c @@ -157,11 +157,13 @@ int s3c_adc_start(struct s3c_adc_client *client, return -EINVAL; } - if (client->is_ts && adc->ts_pend) - return -EAGAIN; - spin_lock_irqsave(&adc->lock, flags); + if (client->is_ts && adc->ts_pend) { + spin_unlock_irqrestore(&adc->lock, flags); + return -EAGAIN; + } + client->channel = channel; client->nr_samples = nr_samples; |