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staging: bcm2835-audio: use conditional only for error case 

* Refactor conditional to check if memory allocation has failed and
immediately return (-ENOMEM); if block for success case is removed.

* Return the error value -EBUSY when queue_work() fails.

Signed-off-by: Aishwarya Pant <aishpant@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Aishwarya Pant 2017-03-12 21:09:31 +05:30 committed by Greg Kroah-Hartman
parent 5e00b25853
commit 8f1fff07b0
1 changed files with 32 additions and 35 deletions
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67
drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c
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@ -131,77 +131,74 @@ static void my_wq_function(struct work_struct *work)
int bcm2835_audio_start(struct bcm2835_alsa_stream *alsa_stream)
{
int ret = -1;
LOG_DBG(" .. IN\n");
if (alsa_stream->my_wq) {
struct bcm2835_audio_work *work;
work = kmalloc(sizeof(*work), GFP_ATOMIC);
/*--- Queue some work (item 1) ---*/
if (work) {
INIT_WORK(&work->my_work, my_wq_function);
work->alsa_stream = alsa_stream;
work->cmd = BCM2835_AUDIO_START;
if (queue_work(alsa_stream->my_wq, &work->my_work))
ret = 0;
} else {
if (!work) {
LOG_ERR(" .. Error: NULL work kmalloc\n");
return -ENOMEM;
}
INIT_WORK(&work->my_work, my_wq_function);
work->alsa_stream = alsa_stream;
work->cmd = BCM2835_AUDIO_START;
if (!queue_work(alsa_stream->my_wq, &work->my_work)) {
return -EBUSY;
}
}
LOG_DBG(" .. OUT %d\n", ret);
return ret;
LOG_DBG(" .. OUT\n");
return 0;
}
int bcm2835_audio_stop(struct bcm2835_alsa_stream *alsa_stream)
{
int ret = -1;
LOG_DBG(" .. IN\n");
if (alsa_stream->my_wq) {
struct bcm2835_audio_work *work;
work = kmalloc(sizeof(*work), GFP_ATOMIC);
/*--- Queue some work (item 1) ---*/
if (work) {
INIT_WORK(&work->my_work, my_wq_function);
work->alsa_stream = alsa_stream;
work->cmd = BCM2835_AUDIO_STOP;
if (queue_work(alsa_stream->my_wq, &work->my_work))
ret = 0;
} else {
if (!work) {
LOG_ERR(" .. Error: NULL work kmalloc\n");
return -ENOMEM;
}
INIT_WORK(&work->my_work, my_wq_function);
work->alsa_stream = alsa_stream;
work->cmd = BCM2835_AUDIO_STOP;
if (!queue_work(alsa_stream->my_wq, &work->my_work)) {
return -EBUSY;
}
}
LOG_DBG(" .. OUT %d\n", ret);
return ret;
LOG_DBG(" .. OUT\n");
return 0;
}
int bcm2835_audio_write(struct bcm2835_alsa_stream *alsa_stream,
unsigned int count, void *src)
{
int ret = -1;
LOG_DBG(" .. IN\n");
if (alsa_stream->my_wq) {
struct bcm2835_audio_work *work;
work = kmalloc(sizeof(*work), GFP_ATOMIC);
/*--- Queue some work (item 1) ---*/
if (work) {
INIT_WORK(&work->my_work, my_wq_function);
work->alsa_stream = alsa_stream;
work->cmd = BCM2835_AUDIO_WRITE;
work->src = src;
work->count = count;
if (queue_work(alsa_stream->my_wq, &work->my_work))
ret = 0;
} else {
if (!work) {
LOG_ERR(" .. Error: NULL work kmalloc\n");
return -ENOMEM;
}
INIT_WORK(&work->my_work, my_wq_function);
work->alsa_stream = alsa_stream;
work->cmd = BCM2835_AUDIO_WRITE;
work->src = src;
work->count = count;
if (!queue_work(alsa_stream->my_wq, &work->my_work)) {
return -EBUSY;
}
}
LOG_DBG(" .. OUT %d\n", ret);
return ret;
LOG_DBG(" .. OUT\n");
return 0;
}
static void my_workqueue_init(struct bcm2835_alsa_stream *alsa_stream)