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[ALSA] seq: resource leak fix and various code cleanups 

This patch fixes:
1) a resource leak (CID: 1817)
2) various code cleanups

Signed-off-by: Eugene Teo <eugeneteo@kernel.sg>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Eugene Teo 2007-08-07 14:34:23 +02:00 committed by Jaroslav Kysela
parent 2880a8670d
commit 7034632d88
2 changed files with 28 additions and 20 deletions
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42
sound/core/seq/oss/seq_oss_init.c
View File

@ -176,28 +176,28 @@ snd_seq_oss_open(struct file *file, int level)
int i, rc;
struct seq_oss_devinfo *dp;
if ((dp = kzalloc(sizeof(*dp), GFP_KERNEL)) == NULL) {
dp = kzalloc(sizeof(*dp), GFP_KERNEL);
if (!dp) {
snd_printk(KERN_ERR "can't malloc device info\n");
return -ENOMEM;
}
debug_printk(("oss_open: dp = %p\n", dp));
dp->cseq = system_client;
dp->port = -1;
dp->queue = -1;
for (i = 0; i < SNDRV_SEQ_OSS_MAX_CLIENTS; i++) {
if (client_table[i] == NULL)
break;
}
if (i >= SNDRV_SEQ_OSS_MAX_CLIENTS) {
snd_printk(KERN_ERR "too many applications\n");
kfree(dp);
return -ENOMEM;
}
dp->index = i;
dp->cseq = system_client;
dp->port = -1;
dp->queue = -1;
dp->readq = NULL;
dp->writeq = NULL;
if (i >= SNDRV_SEQ_OSS_MAX_CLIENTS) {
snd_printk(KERN_ERR "too many applications\n");
rc = -ENOMEM;
goto _error;
}
/* look up synth and midi devices */
snd_seq_oss_synth_setup(dp);
@ -211,14 +211,16 @@ snd_seq_oss_open(struct file *file, int level)
/* create port */
debug_printk(("create new port\n"));
if ((rc = create_port(dp)) < 0) {
rc = create_port(dp);
if (rc < 0) {
snd_printk(KERN_ERR "can't create port\n");
goto _error;
}
/* allocate queue */
debug_printk(("allocate queue\n"));
if ((rc = alloc_seq_queue(dp)) < 0)
rc = alloc_seq_queue(dp);
if (rc < 0)
goto _error;
/* set address */
@ -235,7 +237,8 @@ snd_seq_oss_open(struct file *file, int level)
/* initialize read queue */
debug_printk(("initialize read queue\n"));
if (is_read_mode(dp->file_mode)) {
if ((dp->readq = snd_seq_oss_readq_new(dp, maxqlen)) == NULL) {
dp->readq = snd_seq_oss_readq_new(dp, maxqlen);
if (!dp->readq) {
rc = -ENOMEM;
goto _error;
}
@ -245,7 +248,7 @@ snd_seq_oss_open(struct file *file, int level)
debug_printk(("initialize write queue\n"));
if (is_write_mode(dp->file_mode)) {
dp->writeq = snd_seq_oss_writeq_new(dp, maxqlen);
if (dp->writeq == NULL) {
if (!dp->writeq) {
rc = -ENOMEM;
goto _error;
}
@ -253,7 +256,8 @@ snd_seq_oss_open(struct file *file, int level)
/* initialize timer */
debug_printk(("initialize timer\n"));
if ((dp->timer = snd_seq_oss_timer_new(dp)) == NULL) {
dp->timer = snd_seq_oss_timer_new(dp);
if (!dp->timer) {
snd_printk(KERN_ERR "can't alloc timer\n");
rc = -ENOMEM;
goto _error;
@ -276,11 +280,13 @@ snd_seq_oss_open(struct file *file, int level)
return 0;
_error:
snd_seq_oss_writeq_delete(dp->writeq);
snd_seq_oss_readq_delete(dp->readq);
snd_seq_oss_synth_cleanup(dp);
snd_seq_oss_midi_cleanup(dp);
i = dp->queue;
delete_port(dp);
delete_seq_queue(i);
delete_seq_queue(dp->queue);
kfree(dp);
return rc;
}

6
sound/core/seq/oss/seq_oss_writeq.c
View File

@ -63,8 +63,10 @@ snd_seq_oss_writeq_new(struct seq_oss_devinfo *dp, int maxlen)
void
snd_seq_oss_writeq_delete(struct seq_oss_writeq *q)
{
snd_seq_oss_writeq_clear(q); /* to be sure */
kfree(q);
if (q) {
snd_seq_oss_writeq_clear(q); /* to be sure */
kfree(q);
}
}