diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2014-02-06 13:25:40 +0200 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2014-02-11 23:30:50 +0530 |
| commit | 0f6a928d035b82c0b3aa387d510a73f3e6dbf8e3 (patch) | |
| tree | 7be99bf9737bf54e3729d33369898b72314334da /drivers/dma/dmaengine.c | |
| parent | 8f01258385be3225331d7edd20de905df433aac4 (diff) | |
| download | talos-obmc-linux-0f6a928d035b82c0b3aa387d510a73f3e6dbf8e3.tar.gz talos-obmc-linux-0f6a928d035b82c0b3aa387d510a73f3e6dbf8e3.zip | |
acpi-dma: convert to return error code when asked for channel
Currently acpi_dma_request_slave_chan_by_index() and
acpi_dma_request_slave_chan_by_name() return only requested channel or NULL.
This patch converts them to return appropriate error code instead of NULL in
case of unsuccessfull request.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/dmaengine.c')
| -rw-r--r-- | drivers/dma/dmaengine.c | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index ed610b497518..a886713937fd 100644 --- a/drivers/dma/dmaengine.c +++ b/drivers/dma/dmaengine.c @@ -627,18 +627,13 @@ EXPORT_SYMBOL_GPL(__dma_request_channel); struct dma_chan *dma_request_slave_channel_reason(struct device *dev, const char *name) { - struct dma_chan *chan; - /* If device-tree is present get slave info from here */ if (dev->of_node) return of_dma_request_slave_channel(dev->of_node, name); /* If device was enumerated by ACPI get slave info from here */ - if (ACPI_HANDLE(dev)) { - chan = acpi_dma_request_slave_chan_by_name(dev, name); - if (chan) - return chan; - } + if (ACPI_HANDLE(dev)) + return acpi_dma_request_slave_chan_by_name(dev, name); return ERR_PTR(-ENODEV); } |
