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>
diff --git a/drivers/video/arkfb.c b/drivers/video/arkfb.c
index 5001bd4..38a1e83 100644
--- a/drivers/video/arkfb.c
+++ b/drivers/video/arkfb.c
@@ -1126,11 +1126,8 @@
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 @@
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 536ab11..4a484ee 100644
--- a/drivers/video/vt8623fb.c
+++ b/drivers/video/vt8623fb.c
@@ -853,11 +853,8 @@
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 @@
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;