diff options
| author | Todd Poynor <toddpoynor@google.com> | 2012-07-13 15:30:48 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-07-19 08:58:55 -0700 |
| commit | 5c77ea89ed79a692b0097dbca3652fbc83e30619 (patch) | |
| tree | a260a0925d36f5db62259914d38fc212b5d96fe6 | |
| parent | e301f7b1dbbb0af6dcb8ed10c800fa95bb34917a (diff) | |
ARM: SAMSUNG: fix race in s3c_adc_start for ADC
commit 8265981bb439f3ecc5356fb877a6c2a6636ac88a upstream.
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>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 33ecd0c9f0c3..b1e05ccff3ac 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; |