diff options
| author |   Binoy Jayan <binoy.jayan@linaro.org> | 2017-06-13 05:58:49 -0300 |
|---|---|---|
| committer |   Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-06-24 16:42:00 -0300 |
| commit | 90979f045513e7d3d7fb390dc26117ce95a31804 (patch) | |
| tree | 473a7b7569ee8b199a86b7e687e7f73e4c1b6da4 /drivers | |
| parent | media: ngene: Replace semaphore cmd_mutex with mutex (diff) | |
| download | linux-dev-90979f045513e7d3d7fb390dc26117ce95a31804.tar.xz linux-dev-90979f045513e7d3d7fb390dc26117ce95a31804.zip | |
media: ngene: Replace semaphore stream_mutex with mutex
The semaphore 'stream_mutex' is used as a simple mutex, so
it should be written as one. Also moving the mutex_[lock/unlock]
to the caller as it is anyway locked at the beginning of the
callee thus avoiding repetition.
Signed-off-by: Binoy Jayan <binoy.jayan@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/pci/ngene/ngene-core.c | 18 | ||||
| -rw-r--r-- | drivers/media/pci/ngene/ngene.h | 2 |
2 files changed, 8 insertions, 12 deletions
diff --git a/drivers/media/pci/ngene/ngene-core.c b/drivers/media/pci/ngene/ngene-core.c index eeb61ebbfd2e..ea649012b8c7 100644 --- a/drivers/media/pci/ngene/ngene-core.c +++ b/drivers/media/pci/ngene/ngene-core.c @@ -560,7 +560,6 @@ static int ngene_command_stream_control(struct ngene *dev, u8 stream, u16 BsSPI = ((stream & 1) ? 0x9800 : 0x9700); u16 BsSDO = 0x9B00; - down(&dev->stream_mutex); memset(&com, 0, sizeof(com)); com.cmd.hdr.Opcode = CMD_CONTROL; com.cmd.hdr.Length = sizeof(struct FW_STREAM_CONTROL) - 2; @@ -586,17 +585,13 @@ static int ngene_command_stream_control(struct ngene *dev, u8 stream, chan->State = KSSTATE_ACQUIRE; chan->HWState = HWSTATE_STOP; spin_unlock_irq(&chan->state_lock); - if (ngene_command(dev, &com) < 0) { - up(&dev->stream_mutex); + if (ngene_command(dev, &com) < 0) return -1; - } /* clear_buffers(chan); */ flush_buffers(chan); - up(&dev->stream_mutex); return 0; } spin_unlock_irq(&chan->state_lock); - up(&dev->stream_mutex); return 0; } @@ -692,11 +687,9 @@ static int ngene_command_stream_control(struct ngene *dev, u8 stream, chan->HWState = HWSTATE_STARTUP; spin_unlock_irq(&chan->state_lock); - if (ngene_command(dev, &com) < 0) { - up(&dev->stream_mutex); + if (ngene_command(dev, &com) < 0) return -1; - } - up(&dev->stream_mutex); + return 0; } @@ -750,8 +743,11 @@ void set_transfer(struct ngene_channel *chan, int state) /* else printk(KERN_INFO DEVICE_NAME ": lock=%08x\n", ngreadl(0x9310)); */ + mutex_lock(&dev->stream_mutex); ret = ngene_command_stream_control(dev, chan->number, control, mode, flags); + mutex_unlock(&dev->stream_mutex); + if (!ret) chan->running = state; else @@ -1347,7 +1343,7 @@ static int ngene_start(struct ngene *dev) init_waitqueue_head(&dev->tx_wq); init_waitqueue_head(&dev->rx_wq); mutex_init(&dev->cmd_mutex); - sema_init(&dev->stream_mutex, 1); + mutex_init(&dev->stream_mutex); sema_init(&dev->pll_mutex, 1); sema_init(&dev->i2c_switch_mutex, 1); spin_lock_init(&dev->cmd_lock); diff --git a/drivers/media/pci/ngene/ngene.h b/drivers/media/pci/ngene/ngene.h index e600b70415da..0dd15d61b8ee 100644 --- a/drivers/media/pci/ngene/ngene.h +++ b/drivers/media/pci/ngene/ngene.h @@ -763,7 +763,7 @@ struct ngene { wait_queue_head_t cmd_wq; int cmd_done; struct mutex cmd_mutex; - struct semaphore stream_mutex; + struct mutex stream_mutex; struct semaphore pll_mutex; struct semaphore i2c_switch_mutex; int i2c_current_channel; |