ALSA: rme9652: Adjust seven checks for null pointers

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

Comparison to NULL could be written …

Thus fix the affected source code places.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c
index 8d339fb..25284d8 100644 (file)
--- a/sound/pci/rme9652/hdspm.c
+++ b/sound/pci/rme9652/hdspm.c
@@ -1521,7 +1521,7 @@ static void hdspm_silence_playback(struct hdspm *hdspm)
        int n = hdspm->period_bytes;
        void *buf = hdspm->playback_buffer;
 
-       if (buf == NULL)
+       if (!buf)
                return;
 
        for (i = 0; i < HDSPM_MAX_CHANNELS; i++) {
@@ -4706,7 +4706,7 @@ static int snd_hdspm_create_controls(struct snd_card *card,
                break;
        }
 
-       if (NULL != list) {
+       if (list) {
                for (idx = 0; idx < limit; idx++) {
                        err = snd_ctl_add(card,
                                        snd_ctl_new1(&list[idx], hdspm));
@@ -6069,13 +6069,13 @@ static int snd_hdspm_open(struct snd_pcm_substream *substream)
                snd_hdspm_capture_subinfo;
 
        if (playback) {
-               if (hdspm->capture_substream == NULL)
+               if (!hdspm->capture_substream)
                        hdspm_stop_audio(hdspm);
 
                hdspm->playback_pid = current->pid;
                hdspm->playback_substream = substream;
        } else {
-               if (hdspm->playback_substream == NULL)
+               if (!hdspm->playback_substream)
                        hdspm_stop_audio(hdspm);
 
                hdspm->capture_pid = current->pid;
@@ -6775,9 +6775,9 @@ static int snd_hdspm_create(struct snd_card *card,
                                HDSPM_s2_tco_detect) {
                        hdspm->midiPorts++;
                        hdspm->tco = kzalloc(sizeof(*hdspm->tco), GFP_KERNEL);
-                       if (NULL != hdspm->tco) {
+                       if (hdspm->tco)
                                hdspm_tco_write(hdspm);
-                       }
+
                        dev_info(card->dev, "AIO/RayDAT TCO module found\n");
                } else {
                        hdspm->tco = NULL;
@@ -6789,9 +6789,9 @@ static int snd_hdspm_create(struct snd_card *card,
                if (hdspm_read(hdspm, HDSPM_statusRegister) & HDSPM_tco_detect) {
                        hdspm->midiPorts++;
                        hdspm->tco = kzalloc(sizeof(*hdspm->tco), GFP_KERNEL);
-                       if (NULL != hdspm->tco) {
+                       if (hdspm->tco)
                                hdspm_tco_write(hdspm);
-                       }
+
                        dev_info(card->dev, "MADI/AES TCO module found\n");
                } else {
                        hdspm->tco = NULL;
@@ -6868,7 +6868,7 @@ static int snd_hdspm_create(struct snd_card *card,
                 * this case, we don't set card->id to avoid collisions
                 * when running with multiple cards.
                 */
-               if (NULL == id[hdspm->dev] && hdspm->serial != 0xFFFFFF) {
+               if (!id[hdspm->dev] && hdspm->serial != 0xFFFFFF) {
                        snprintf(card->id, sizeof(card->id),
                                 "HDSPMx%06x", hdspm->serial);
                        snd_card_set_id(card, card->id);