[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>
diff --git a/sound/core/seq/oss/seq_oss_init.c b/sound/core/seq/oss/seq_oss_init.c
index ca5a2ed..d0d721c 100644
--- a/sound/core/seq/oss/seq_oss_init.c
+++ b/sound/core/seq/oss/seq_oss_init.c
@@ -176,28 +176,28 @@
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 @@
/* 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 @@
/* 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 @@
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 @@
/* 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 @@
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;
}
diff --git a/sound/core/seq/oss/seq_oss_writeq.c b/sound/core/seq/oss/seq_oss_writeq.c
index 5c84956..2174248 100644
--- a/sound/core/seq/oss/seq_oss_writeq.c
+++ b/sound/core/seq/oss/seq_oss_writeq.c
@@ -63,8 +63,10 @@
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);
+ }
}