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media: ngene: Replace semaphore cmd_mutex with mutex 

The semaphore 'cmd_mutex' is used as a simple mutex, so
it should be written as one. Also, replace down with
mutex_destroy to ensure sane state when ngene_stop is
called.

Signed-off-by: Binoy Jayan <binoy.jayan@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Binoy Jayan 2017-06-13 05:58:48 -03:00 committed by Mauro Carvalho Chehab
parent f7d84fa704
commit 1439cdb031
2 changed files with 7 additions and 7 deletions
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12
drivers/media/pci/ngene/ngene-core.c
View File

@ -336,9 +336,9 @@ int ngene_command(struct ngene *dev, struct ngene_command *com)
{
int result;
down(&dev->cmd_mutex);
mutex_lock(&dev->cmd_mutex);
result = ngene_command_mutex(dev, com);
up(&dev->cmd_mutex);
mutex_unlock(&dev->cmd_mutex);
return result;
}
@ -1283,7 +1283,7 @@ static int ngene_load_firm(struct ngene *dev)
static void ngene_stop(struct ngene *dev)
{
down(&dev->cmd_mutex);
mutex_destroy(&dev->cmd_mutex);
i2c_del_adapter(&(dev->channel[0].i2c_adapter));
i2c_del_adapter(&(dev->channel[1].i2c_adapter));
ngwritel(0, NGENE_INT_ENABLE);
@ -1346,7 +1346,7 @@ static int ngene_start(struct ngene *dev)
init_waitqueue_head(&dev->cmd_wq);
init_waitqueue_head(&dev->tx_wq);
init_waitqueue_head(&dev->rx_wq);
sema_init(&dev->cmd_mutex, 1);
mutex_init(&dev->cmd_mutex);
sema_init(&dev->stream_mutex, 1);
sema_init(&dev->pll_mutex, 1);
sema_init(&dev->i2c_switch_mutex, 1);
@ -1606,10 +1606,10 @@ static void ngene_unlink(struct ngene *dev)
com.in_len = 3;
com.out_len = 1;
down(&dev->cmd_mutex);
mutex_lock(&dev->cmd_mutex);
ngwritel(0, NGENE_INT_ENABLE);
ngene_command_mutex(dev, &com);
up(&dev->cmd_mutex);
mutex_unlock(&dev->cmd_mutex);
}
void ngene_shutdown(struct pci_dev *pdev)

2
drivers/media/pci/ngene/ngene.h
View File

@ -762,7 +762,7 @@ struct ngene {
wait_queue_head_t cmd_wq;
int cmd_done;
struct semaphore cmd_mutex;
struct mutex cmd_mutex;
struct semaphore stream_mutex;
struct semaphore pll_mutex;
struct semaphore i2c_switch_mutex;