From: Markus Elfring elfring@users.sourceforge.net Date: Sat, 11 Nov 2017 11:48:25 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit
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 --- sound/core/rawmidi.c | 42 +++++++++++++++++++++--------------------- 1 file changed, 21 insertions(+), 21 deletions(-)
diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c index 34686000ecce..1934de257a1e 100644 --- a/sound/core/rawmidi.c +++ b/sound/core/rawmidi.c @@ -343,7 +343,7 @@ int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,
mutex_lock(®ister_mutex); rmidi = snd_rawmidi_search(card, device); - if (rmidi == NULL) { + if (!rmidi) { mutex_unlock(®ister_mutex); return -ENODEV; } @@ -391,7 +391,7 @@ static int snd_rawmidi_open(struct inode *inode, struct file *file) } else return -ENXIO;
- if (rmidi == NULL) + if (!rmidi) return -ENODEV;
if (!try_module_get(rmidi->card->module)) { @@ -408,7 +408,7 @@ static int snd_rawmidi_open(struct inode *inode, struct file *file) if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */ fflags |= SNDRV_RAWMIDI_LFLG_APPEND; rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL); - if (rawmidi_file == NULL) { + if (!rawmidi_file) { err = -ENOMEM; goto __error; } @@ -552,7 +552,7 @@ static int snd_rawmidi_info(struct snd_rawmidi_substream *substream, { struct snd_rawmidi *rmidi; - if (substream == NULL) + if (!substream) return -ENODEV; rmidi = substream->rmidi; memset(info, 0, sizeof(*info)); @@ -745,11 +745,11 @@ static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long return -EFAULT; switch (params.stream) { case SNDRV_RAWMIDI_STREAM_OUTPUT: - if (rfile->output == NULL) + if (!rfile->output) return -EINVAL; return snd_rawmidi_output_params(rfile->output, ¶ms); case SNDRV_RAWMIDI_STREAM_INPUT: - if (rfile->input == NULL) + if (!rfile->input) return -EINVAL; return snd_rawmidi_input_params(rfile->input, ¶ms); default: @@ -764,12 +764,12 @@ static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long return -EFAULT; switch (status.stream) { case SNDRV_RAWMIDI_STREAM_OUTPUT: - if (rfile->output == NULL) + if (!rfile->output) return -EINVAL; err = snd_rawmidi_output_status(rfile->output, &status); break; case SNDRV_RAWMIDI_STREAM_INPUT: - if (rfile->input == NULL) + if (!rfile->input) return -EINVAL; err = snd_rawmidi_input_status(rfile->input, &status); break; @@ -789,7 +789,7 @@ static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long return -EFAULT; switch (val) { case SNDRV_RAWMIDI_STREAM_OUTPUT: - if (rfile->output == NULL) + if (!rfile->output) return -EINVAL; return snd_rawmidi_drop_output(rfile->output); default: @@ -803,11 +803,11 @@ static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long return -EFAULT; switch (val) { case SNDRV_RAWMIDI_STREAM_OUTPUT: - if (rfile->output == NULL) + if (!rfile->output) return -EINVAL; return snd_rawmidi_drain_output(rfile->output); case SNDRV_RAWMIDI_STREAM_INPUT: - if (rfile->input == NULL) + if (!rfile->input) return -EINVAL; return snd_rawmidi_drain_input(rfile->input); default: @@ -885,7 +885,7 @@ int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
if (!substream->opened) return -EBADFD; - if (runtime->buffer == NULL) { + if (!runtime->buffer) { rmidi_dbg(substream->rmidi, "snd_rawmidi_receive: input is not active!!!\n"); return -EINVAL; @@ -999,7 +999,7 @@ static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t coun
rfile = file->private_data; substream = rfile->input; - if (substream == NULL) + if (!substream) return -EIO; runtime = substream->runtime; snd_rawmidi_input_trigger(substream, 1); @@ -1052,7 +1052,7 @@ int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream) int result; unsigned long flags;
- if (runtime->buffer == NULL) { + if (!runtime->buffer) { rmidi_dbg(substream->rmidi, "snd_rawmidi_transmit_empty: output is not active!!!\n"); return 1; @@ -1078,7 +1078,7 @@ int __snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, int result, count1; struct snd_rawmidi_runtime *runtime = substream->runtime;
- if (runtime->buffer == NULL) { + if (!runtime->buffer) { rmidi_dbg(substream->rmidi, "snd_rawmidi_transmit_peek: output is not active!!!\n"); return -EINVAL; @@ -1151,7 +1151,7 @@ int __snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int coun { struct snd_rawmidi_runtime *runtime = substream->runtime;
- if (runtime->buffer == NULL) { + if (!runtime->buffer) { rmidi_dbg(substream->rmidi, "snd_rawmidi_transmit_ack: output is not active!!!\n"); return -EINVAL; @@ -1369,21 +1369,21 @@ static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait) unsigned int mask;
rfile = file->private_data; - if (rfile->input != NULL) { + if (rfile->input) { runtime = rfile->input->runtime; snd_rawmidi_input_trigger(rfile->input, 1); poll_wait(file, &runtime->sleep, wait); } - if (rfile->output != NULL) { + if (rfile->output) { runtime = rfile->output->runtime; poll_wait(file, &runtime->sleep, wait); } mask = 0; - if (rfile->input != NULL) { + if (rfile->input) { if (snd_rawmidi_ready(rfile->input)) mask |= POLLIN | POLLRDNORM; } - if (rfile->output != NULL) { + if (rfile->output) { if (snd_rawmidi_ready(rfile->output)) mask |= POLLOUT | POLLWRNORM; } @@ -1547,7 +1547,7 @@ int snd_rawmidi_new(struct snd_card *card, char *id, int device, INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams); INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams);
- if (id != NULL) + if (id) strlcpy(rmidi->id, id, sizeof(rmidi->id));
snd_device_initialize(&rmidi->dev, card);