diff options
| author | Julia Lawall | 2008-07-29 22:33:28 -0700 |
|---|---|---|
| committer | Linus Torvalds | 2008-07-30 09:41:45 -0700 |
| commit | 950d442ad053e660538cdaa6efc0e060c2a65062 (patch) | |
| tree | c980cdf6c6a1a7a0dec19a9368b5445e1fb7db4a /drivers | |
| parent | d667b6ddbcdc036a27407c8b2c1243f1dfd69e26 (diff) | |
drivers/video: release mutex in error handling code
The mutex is released on a successful return, so it would seem that it
should be released on an error return as well.
The semantic patch finds this problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@@
expression l;
@@
mutex_lock(l);
... when != mutex_unlock(l)
when any
when strict
(
if (...) { ... when != mutex_unlock(l)
+ mutex_unlock(l);
return ...;
}
|
mutex_unlock(l);
)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Acked-by: Ondrej Zajicek <santiago@crfreenet.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/video/arkfb.c | 9 | ||||
| -rw-r--r-- | drivers/video/vt8623fb.c | 9 |
2 files changed, 6 insertions, 12 deletions
diff --git a/drivers/video/arkfb.c b/drivers/video/arkfb.c index 5001bd4ef466..38a1e8308c83 100644 --- a/drivers/video/arkfb.c +++ b/drivers/video/arkfb.c @@ -1126,11 +1126,8 @@ static int ark_pci_resume (struct pci_dev* dev) acquire_console_sem(); mutex_lock(&(par->open_lock)); - if (par->ref_count == 0) { - mutex_unlock(&(par->open_lock)); - release_console_sem(); - return 0; - } + if (par->ref_count == 0) + goto fail; pci_set_power_state(dev, PCI_D0); pci_restore_state(dev); @@ -1143,8 +1140,8 @@ static int ark_pci_resume (struct pci_dev* dev) arkfb_set_par(info); fb_set_suspend(info, 0); - mutex_unlock(&(par->open_lock)); fail: + mutex_unlock(&(par->open_lock)); release_console_sem(); return 0; } diff --git a/drivers/video/vt8623fb.c b/drivers/video/vt8623fb.c index 536ab11623f0..4a484ee98f8a 100644 --- a/drivers/video/vt8623fb.c +++ b/drivers/video/vt8623fb.c @@ -853,11 +853,8 @@ static int vt8623_pci_resume(struct pci_dev* dev) acquire_console_sem(); mutex_lock(&(par->open_lock)); - if (par->ref_count == 0) { - mutex_unlock(&(par->open_lock)); - release_console_sem(); - return 0; - } + if (par->ref_count == 0) + goto fail; pci_set_power_state(dev, PCI_D0); pci_restore_state(dev); @@ -870,8 +867,8 @@ static int vt8623_pci_resume(struct pci_dev* dev) vt8623fb_set_par(info); fb_set_suspend(info, 0); - mutex_unlock(&(par->open_lock)); fail: + mutex_unlock(&(par->open_lock)); release_console_sem(); return 0; |