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| author | Andy Shevchenko | 2014-02-06 12:25:40 +0100 |
|---|---|---|
| committer | Vinod Koul | 2014-02-11 19:00:50 +0100 |
| commit | 0f6a928d035b82c0b3aa387d510a73f3e6dbf8e3 (patch) | |
| tree | 7be99bf9737bf54e3729d33369898b72314334da /include/linux/acpi_dma.h | |
| parent | acpi-dma: use devm_release() instead of devm_destroy() (diff) | |
| download | kernel-qcow2-linux-0f6a928d035b82c0b3aa387d510a73f3e6dbf8e3.tar.gz kernel-qcow2-linux-0f6a928d035b82c0b3aa387d510a73f3e6dbf8e3.tar.xz kernel-qcow2-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 'include/linux/acpi_dma.h')
| -rw-r--r-- | include/linux/acpi_dma.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/acpi_dma.h b/include/linux/acpi_dma.h index fb0298082916..329436d38e66 100644 --- a/include/linux/acpi_dma.h +++ b/include/linux/acpi_dma.h @@ -16,6 +16,7 @@ #include <linux/list.h> #include <linux/device.h> +#include <linux/err.h> #include <linux/dmaengine.h> /** @@ -103,12 +104,12 @@ static inline void devm_acpi_dma_controller_free(struct device *dev) static inline struct dma_chan *acpi_dma_request_slave_chan_by_index( struct device *dev, size_t index) { - return NULL; + return ERR_PTR(-ENODEV); } static inline struct dma_chan *acpi_dma_request_slave_chan_by_name( struct device *dev, const char *name) { - return NULL; + return ERR_PTR(-ENODEV); } #define acpi_dma_simple_xlate NULL |