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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2014-02-06 13:25:40 +0200
committerVinod Koul <vinod.koul@intel.com>2014-02-11 23:30:50 +0530
commit0f6a928d035b82c0b3aa387d510a73f3e6dbf8e3 (patch)
tree7be99bf9737bf54e3729d33369898b72314334da /include/linux/acpi_dma.h
parent8f01258385be3225331d7edd20de905df433aac4 (diff)
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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.h5
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