From 73f6a12ed187b7e7ac9334d1419ba7bf7ac1be26 Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Thu, 27 Nov 2008 15:40:40 +0100 Subject: 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/) // @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) // Signed-off-by: Julia Lawall Signed-off-by: Takashi Iwai --- sound/pci/pcxhr/pcxhr.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'sound/pci/pcxhr') diff --git a/sound/pci/pcxhr/pcxhr.c b/sound/pci/pcxhr/pcxhr.c index 0e06c6c..58621206 100644 --- a/sound/pci/pcxhr/pcxhr.c +++ b/sound/pci/pcxhr/pcxhr.c @@ -1024,7 +1024,7 @@ static int __devinit pcxhr_create(struct pcxhr_mgr *mgr, struct snd_card *card, .dev_free = pcxhr_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; @@ -1050,6 +1050,7 @@ static int __devinit pcxhr_create(struct pcxhr_mgr *mgr, struct snd_card *card, return err; } + mgr->chip[idx] = chip; snd_card_set_dev(card, &mgr->pci->dev); return 0; @@ -1307,6 +1308,7 @@ static int __devinit pcxhr_probe(struct pci_dev *pci, const struct pci_device_id sprintf(card->longname, "%s [PCM #%d]", mgr->longname, i); if ((err = pcxhr_create(mgr, card, i)) < 0) { + snd_card_free(card); pcxhr_free(mgr); return err; } -- cgit v1.1