* [PATCH 2/7] uvesafb: always use mutexes when accessing uvfb_tasks
@ 2007-08-11 14:39 Michal Januszewski
0 siblings, 0 replies; only message in thread
From: Michal Januszewski @ 2007-08-11 14:39 UTC (permalink / raw)
To: linux-fbdev-devel; +Cc: linux-kernel
Accesses to the uvfb_tasks array should be always be protected by a
mutex to avoid race conditions.
Signed-off-by: Michal Januszewski <spock@gentoo.org>
---
diff --git a/drivers/video/uvesafb.c b/drivers/video/uvesafb.c
index aa5a9c3..e480670 100644
--- a/drivers/video/uvesafb.c
+++ b/drivers/video/uvesafb.c
@@ -208,6 +208,10 @@ static int uvesafb_exec(struct uvesafb_ktask *task)
err = !wait_for_completion_timeout(task->done,
msecs_to_jiffies(UVESAFB_TIMEOUT));
+ mutex_lock(&uvfb_lock);
+ uvfb_tasks[seq] = NULL;
+ mutex_unlock(&uvfb_lock);
+
seq++;
if (seq >= UVESAFB_TASKS_MAX)
seq = 0;
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