lkml.org 
[lkml]   [2012]   [Jul]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[ 045/108] ARM: SAMSUNG: fix race in s3c_adc_start for ADC
3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Todd Poynor <toddpoynor@google.com>

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: Ben Hutchings <ben@decadent.org.uk>
---
arch/arm/plat-samsung/adc.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

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




\
 
 \ /
  Last update: 2012-07-23 04:42    [W:0.285 / U:1.632 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site