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authorJulia Lawall <julia@diku.dk>2008-11-27 17:40:40 +0300
committerTakashi Iwai <tiwai@suse.de>2008-11-27 17:42:15 +0300
commit73f6a12ed187b7e7ac9334d1419ba7bf7ac1be26 (patch)
treefd88332a69ce13ca9253e586a6c5d828f747d388 /sound/pci/mixart
parent12666f050b3b4b122f61ef12707f33fadb4a78b5 (diff)
downloadlinux-73f6a12ed187b7e7ac9334d1419ba7bf7ac1be26.tar.xz
ALSA: sound/pci/mixart/mixart.c: Add missing snd_card_free
The function snd_mixart_create creates a link between mgr and card that allows snd_mixart_free to free card as well. But if snd_mixart_create fails, then the link has not been created and card has to be freed explicitly. The semantic match that finds the problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @r exists@ local idexpression x; statement S,S1; position p1,p2,p3; expression E,E1; type T,T1; expression *ptr != NULL; @@ ( if ((x@p1 = snd_card_new(...)) == NULL) S | x@p1 = snd_card_new(...); ) ... when != snd_card_free(...,(T)x,...) when != if (...) { <+... snd_card_free(...,(T)x,...) ...+> } when != true x == NULL || ... when != x = E when != E = (T)x when any ( if (x == NULL || ...) S1 | if@p2 (...) { ... when != snd_card_free(...,(T1)x,...) when != if (...) { <+... snd_card_free(...,(T1)x,...) ...+> } when != x = E1 when != E1 = (T1)x ( return \(0\|<+...x...+>\|ptr\); | return@p3 ...; ) } ) @ script:python @ p1 << r.p1; p3 << r.p3; @@ print "* file: %s snd_card_new: %s return: %s" % (p1[0].file,p1[0].line,p3[0].line) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/mixart')
-rw-r--r--sound/pci/mixart/mixart.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/sound/pci/mixart/mixart.c b/sound/pci/mixart/mixart.c
index 2d0dce649a64..fd9a117f37a4 100644
--- a/sound/pci/mixart/mixart.c
+++ b/sound/pci/mixart/mixart.c
@@ -1010,7 +1010,7 @@ static int __devinit snd_mixart_create(struct mixart_mgr *mgr, struct snd_card *
.dev_free = snd_mixart_chip_dev_free,
};
- mgr->chip[idx] = chip = kzalloc(sizeof(*chip), GFP_KERNEL);
+ chip = kzalloc(sizeof(*chip), GFP_KERNEL);
if (! chip) {
snd_printk(KERN_ERR "cannot allocate chip\n");
return -ENOMEM;
@@ -1025,6 +1025,7 @@ static int __devinit snd_mixart_create(struct mixart_mgr *mgr, struct snd_card *
return err;
}
+ mgr->chip[idx] = chip;
snd_card_set_dev(card, &mgr->pci->dev);
return 0;
@@ -1378,6 +1379,7 @@ static int __devinit snd_mixart_probe(struct pci_dev *pci,
sprintf(card->longname, "%s [PCM #%d]", mgr->longname, i);
if ((err = snd_mixart_create(mgr, card, i)) < 0) {
+ snd_card_free(card);
snd_mixart_free(mgr);
return err;
}