ARM: SAMSUNG: fix race in s3c_adc_start for ADC

[pandora-kernel.git] / arch / arm / plat-samsung / adc.c

diff --git a/arch/arm/plat-samsung/adc.c b/arch/arm/plat-samsung/adc.c
index 33ecd0c..b1e05cc 100644 (file)
--- 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;