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authorJulia Lawall <julia@diku.dk>2008-07-29 22:33:28 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-30 09:41:45 -0700
commit950d442ad053e660538cdaa6efc0e060c2a65062 (patch)
treec980cdf6c6a1a7a0dec19a9368b5445e1fb7db4a
parentd667b6ddbcdc036a27407c8b2c1243f1dfd69e26 (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>
-rw-r--r--drivers/video/arkfb.c9
-rw-r--r--drivers/video/vt8623fb.c9
2 files changed, 6 insertions, 12 deletions
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 @@ 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 536ab11..4a484ee 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;