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ALSA: emux: Adjust four checks for null pointers

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The script “checkpatch.pl” pointed information out like the following.

Comparison to NULL could be written !…

Thus fix affected source code places.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Markus Elfring 2017-08-09 09:22:42 +02:00 committed by Takashi Iwai
parent 949a0c23de
commit fbc020b48c
1 changed files with 4 additions and 4 deletions
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8
sound/synth/emux/emux_seq.c
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@ -99,7 +99,7 @@ snd_emux_init_seq(struct snd_emux *emu, struct snd_card *card, int index)
sprintf(tmpname, "%s Port %d", emu->name, i);
p = snd_emux_create_port(emu, tmpname, MIDI_CHANNELS,
0, &pinfo);
if (p == NULL) {
if (!p) {
snd_printk(KERN_ERR "can't create port\n");
return -ENOMEM;
}
@ -151,7 +151,7 @@ snd_emux_create_port(struct snd_emux *emu, char *name,
}
p->chset.channels = kcalloc(max_channels, sizeof(*p->chset.channels),
GFP_KERNEL);
if (p->chset.channels == NULL) {
if (!p->chset.channels) {
snd_printk(KERN_ERR "no memory\n");
kfree(p);
return NULL;
@ -373,7 +373,7 @@ int snd_emux_init_virmidi(struct snd_emux *emu, struct snd_card *card)
return 0;
emu->vmidi = kcalloc(emu->midi_ports, sizeof(*emu->vmidi), GFP_KERNEL);
if (emu->vmidi == NULL)
if (!emu->vmidi)
return -ENOMEM;
for (i = 0; i < emu->midi_ports; i++) {
@ -405,7 +405,7 @@ int snd_emux_delete_virmidi(struct snd_emux *emu)
{
int i;
if (emu->vmidi == NULL)
if (!emu->vmidi)
return 0;
for (i = 0; i < emu->midi_ports; i++) {