rocket.c: fix unchecked mutex_lock_interruptible()
Check the return of mutex_lock_interruptible() in drivers/char/rocket.c and
return ERESTARTSYS if we were interrupted.
Signed-off-by: Satyam Sharma <satyam.sharma@gmail.com>
Cc: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/char/rocket.c b/drivers/char/rocket.c
index a3fd7e7..0270080 100644
--- a/drivers/char/rocket.c
+++ b/drivers/char/rocket.c
@@ -1702,7 +1702,8 @@
if (count <= 0 || rocket_paranoia_check(info, "rp_write"))
return 0;
- mutex_lock_interruptible(&info->write_mtx);
+ if (mutex_lock_interruptible(&info->write_mtx))
+ return -ERESTARTSYS;
#ifdef ROCKET_DEBUG_WRITE
printk(KERN_INFO "rp_write %d chars...", count);