From: Binoy Jayan <binoy.jayan@linaro.org>
To: Binoy Jayan <binoy.jayan@linaro.org>
Cc: linux-kernel@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
Rajendra <rnayak@codeaurora.org>, Mark Brown <broonie@kernel.org>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Sakari Ailus <sakari.ailus@linux.intel.com>,
Julia Lawall <Julia.Lawall@lip6.fr>,
"Michael S. Tsirkin" <mst@redhat.com>,
Cao jin <caoj.fnst@cn.fujitsu.com>,
linux-media@vger.kernel.org
Subject: [PATCH v2 1/3] media: ngene: Replace semaphore cmd_mutex with mutex
Date: Tue, 13 Jun 2017 14:28:48 +0530 [thread overview]
Message-ID: <1497344330-13915-2-git-send-email-binoy.jayan@linaro.org> (raw)
In-Reply-To: <1497344330-13915-1-git-send-email-binoy.jayan@linaro.org>
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>
---
drivers/media/pci/ngene/ngene-core.c | 12 ++++++------
drivers/media/pci/ngene/ngene.h | 2 +-
2 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/media/pci/ngene/ngene-core.c b/drivers/media/pci/ngene/ngene-core.c
index ce69e64..eeb61eb 100644
--- a/drivers/media/pci/ngene/ngene-core.c
+++ b/drivers/media/pci/ngene/ngene-core.c
@@ -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)
diff --git a/drivers/media/pci/ngene/ngene.h b/drivers/media/pci/ngene/ngene.h
index 10d8f74..e600b70 100644
--- a/drivers/media/pci/ngene/ngene.h
+++ b/drivers/media/pci/ngene/ngene.h
@@ -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;
--
Binoy Jayan
next prev parent reply other threads:[~2017-06-13 8:59 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-13 8:58 [PATCH v2 0/3] ngene: Replace semaphores with mutexes Binoy Jayan
2017-06-13 8:58 ` Binoy Jayan [this message]
2017-06-13 8:58 ` [PATCH v2 2/3] media: ngene: Replace semaphore stream_mutex with mutex Binoy Jayan
2017-06-13 8:58 ` [PATCH v2 3/3] media: ngene: Replace semaphore i2c_switch_mutex " Binoy Jayan
2017-06-13 9:49 ` [PATCH v2 0/3] ngene: Replace semaphores with mutexes Arnd Bergmann
2017-06-13 10:31 ` Binoy Jayan
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