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authorJulia Lawall <julia@diku.dk>2010-05-26 17:54:39 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2010-05-27 22:03:09 -0400
commitcc967be54710d97c05229b2e5ba2d00df84ddd64 (patch)
treef2b5f79ee07f16abe92f27c6663dea4339d2f437
parentea635c64e007061f6468ece5cc9cc62d41d4ecf2 (diff)
fs: Add missing mutex_unlock
Add a mutex_unlock missing on the error path. At other exists from the function that return an error flag, the mutex is unlocked, so do the same here. The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression E1; @@ * mutex_lock(E1,...); <+... when != E1 if (...) { ... when != E1 * return ...; } ...+> * mutex_unlock(E1,...); // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--fs/pipe.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/fs/pipe.c b/fs/pipe.c
index d79872eba09a..60da077400f1 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -1169,14 +1169,18 @@ long pipe_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
switch (cmd) {
case F_SETPIPE_SZ:
- if (!capable(CAP_SYS_ADMIN) && arg > pipe_max_pages)
- return -EINVAL;
+ if (!capable(CAP_SYS_ADMIN) && arg > pipe_max_pages) {
+ ret = -EINVAL;
+ goto out;
+ }
/*
* The pipe needs to be at least 2 pages large to
* guarantee POSIX behaviour.
*/
- if (arg < 2)
- return -EINVAL;
+ if (arg < 2) {
+ ret = -EINVAL;
+ goto out;
+ }
ret = pipe_set_size(pipe, arg);
break;
case F_GETPIPE_SZ:
@@ -1187,6 +1191,7 @@ long pipe_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
break;
}
+out:
mutex_unlock(&pipe->inode->i_mutex);
return ret;
}

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