diff options
author | Daniel Scheller <d.scheller@gmx.net> | 2018-04-16 13:36:00 -0400 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2018-04-17 05:52:43 -0400 |
commit | 8b8fcf32502694971fb7f166030361212cb2f9e6 (patch) | |
tree | 9f046adcb6c9154e7247b4deecd6467aa0ff006e /drivers | |
parent | cac61a1acb1def146c3900f1c8f7af4947d98814 (diff) |
media: ddbridge: don't uselessly check for dma in start/stop functions
The check for a valid ptr in ddb_io->dma isn't really necessary since only
devices that do data transport using DMA are supported by the driver, and
all previous initialisation code (through input_init(), output_init() and
dma_init(), has_dma is always true as it's set in ddb_probe() during
driver load) guarantees the ptr is set.
As a side effect, this silences these sparse warnings (albeit them being
false positives as ddb_io->dma won't change in these functions so the
condition always equals to the same result):
drivers/media/pci/ddbridge/ddbridge-core.c:495:9: warning: context imbalance in 'ddb_output_start' - different lock contexts for basic block
drivers/media/pci/ddbridge/ddbridge-core.c:510:9: warning: context imbalance in 'ddb_output_stop' - different lock contexts for basic block
drivers/media/pci/ddbridge/ddbridge-core.c:525:9: warning: context imbalance in 'ddb_input_stop' - different lock contexts for basic block
drivers/media/pci/ddbridge/ddbridge-core.c:560:9: warning: context imbalance in 'ddb_input_start' - different lock contexts for basic block
Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/media/pci/ddbridge/ddbridge-core.c | 85 |
1 files changed, 35 insertions, 50 deletions
diff --git a/drivers/media/pci/ddbridge/ddbridge-core.c b/drivers/media/pci/ddbridge/ddbridge-core.c index 90687eff5909..c90f2933df8d 100644 --- a/drivers/media/pci/ddbridge/ddbridge-core.c +++ b/drivers/media/pci/ddbridge/ddbridge-core.c @@ -410,13 +410,11 @@ static void ddb_output_start(struct ddb_output *output) struct ddb *dev = output->port->dev; u32 con = 0x11c, con2 = 0; - if (output->dma) { - spin_lock_irq(&output->dma->lock); - output->dma->cbuf = 0; - output->dma->coff = 0; - output->dma->stat = 0; - ddbwritel(dev, 0, DMA_BUFFER_CONTROL(output->dma)); - } + spin_lock_irq(&output->dma->lock); + output->dma->cbuf = 0; + output->dma->coff = 0; + output->dma->stat = 0; + ddbwritel(dev, 0, DMA_BUFFER_CONTROL(output->dma)); if (output->port->input[0]->port->class == DDB_PORT_LOOP) con = (1UL << 13) | 0x14; @@ -429,36 +427,29 @@ static void ddb_output_start(struct ddb_output *output) ddbwritel(dev, con, TS_CONTROL(output)); ddbwritel(dev, con2, TS_CONTROL2(output)); - if (output->dma) { - ddbwritel(dev, output->dma->bufval, - DMA_BUFFER_SIZE(output->dma)); - ddbwritel(dev, 0, DMA_BUFFER_ACK(output->dma)); - ddbwritel(dev, 1, DMA_BASE_READ); - ddbwritel(dev, 7, DMA_BUFFER_CONTROL(output->dma)); - } + ddbwritel(dev, output->dma->bufval, + DMA_BUFFER_SIZE(output->dma)); + ddbwritel(dev, 0, DMA_BUFFER_ACK(output->dma)); + ddbwritel(dev, 1, DMA_BASE_READ); + ddbwritel(dev, 7, DMA_BUFFER_CONTROL(output->dma)); ddbwritel(dev, con | 1, TS_CONTROL(output)); - if (output->dma) { - output->dma->running = 1; - spin_unlock_irq(&output->dma->lock); - } + output->dma->running = 1; + spin_unlock_irq(&output->dma->lock); } static void ddb_output_stop(struct ddb_output *output) { struct ddb *dev = output->port->dev; - if (output->dma) - spin_lock_irq(&output->dma->lock); + spin_lock_irq(&output->dma->lock); ddbwritel(dev, 0, TS_CONTROL(output)); - if (output->dma) { - ddbwritel(dev, 0, DMA_BUFFER_CONTROL(output->dma)); - output->dma->running = 0; - spin_unlock_irq(&output->dma->lock); - } + ddbwritel(dev, 0, DMA_BUFFER_CONTROL(output->dma)); + output->dma->running = 0; + spin_unlock_irq(&output->dma->lock); } static void ddb_input_stop(struct ddb_input *input) @@ -466,45 +457,39 @@ static void ddb_input_stop(struct ddb_input *input) struct ddb *dev = input->port->dev; u32 tag = DDB_LINK_TAG(input->port->lnr); - if (input->dma) - spin_lock_irq(&input->dma->lock); + spin_lock_irq(&input->dma->lock); + ddbwritel(dev, 0, tag | TS_CONTROL(input)); - if (input->dma) { - ddbwritel(dev, 0, DMA_BUFFER_CONTROL(input->dma)); - input->dma->running = 0; - spin_unlock_irq(&input->dma->lock); - } + + ddbwritel(dev, 0, DMA_BUFFER_CONTROL(input->dma)); + input->dma->running = 0; + spin_unlock_irq(&input->dma->lock); } static void ddb_input_start(struct ddb_input *input) { struct ddb *dev = input->port->dev; - if (input->dma) { - spin_lock_irq(&input->dma->lock); - input->dma->cbuf = 0; - input->dma->coff = 0; - input->dma->stat = 0; - ddbwritel(dev, 0, DMA_BUFFER_CONTROL(input->dma)); - } + spin_lock_irq(&input->dma->lock); + input->dma->cbuf = 0; + input->dma->coff = 0; + input->dma->stat = 0; + ddbwritel(dev, 0, DMA_BUFFER_CONTROL(input->dma)); + ddbwritel(dev, 0, TS_CONTROL(input)); ddbwritel(dev, 2, TS_CONTROL(input)); ddbwritel(dev, 0, TS_CONTROL(input)); - if (input->dma) { - ddbwritel(dev, input->dma->bufval, - DMA_BUFFER_SIZE(input->dma)); - ddbwritel(dev, 0, DMA_BUFFER_ACK(input->dma)); - ddbwritel(dev, 1, DMA_BASE_WRITE); - ddbwritel(dev, 3, DMA_BUFFER_CONTROL(input->dma)); - } + ddbwritel(dev, input->dma->bufval, + DMA_BUFFER_SIZE(input->dma)); + ddbwritel(dev, 0, DMA_BUFFER_ACK(input->dma)); + ddbwritel(dev, 1, DMA_BASE_WRITE); + ddbwritel(dev, 3, DMA_BUFFER_CONTROL(input->dma)); ddbwritel(dev, 0x09, TS_CONTROL(input)); - if (input->dma) { - input->dma->running = 1; - spin_unlock_irq(&input->dma->lock); - } + input->dma->running = 1; + spin_unlock_irq(&input->dma->lock); } static void ddb_input_start_all(struct ddb_input *input) |