Even if we are not going to get a channel the message is issued. Check the
result of acpi_dma_request_slave_chan_by_index() before issuing the message.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
drivers/dma/acpi-dma.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/dma/acpi-dma.c b/drivers/dma/acpi-dma.c
index eed6bda..9927101 100644
--- a/drivers/dma/acpi-dma.c
+++ b/drivers/dma/acpi-dma.c
@@ -426,6 +426,7 @@ EXPORT_SYMBOL_GPL(acpi_dma_request_slave_chan_by_index);
struct dma_chan *acpi_dma_request_slave_chan_by_name(struct device *dev,
const char *name)
{
+ struct dma_chan *chan;
int index;
index = device_property_match_string(dev, "dma-names", name);
@@ -438,8 +439,12 @@ struct dma_chan *acpi_dma_request_slave_chan_by_name(struct device *dev,
return ERR_PTR(-ENODEV);
}
+ chan = acpi_dma_request_slave_chan_by_index(dev, index);
+ if (IS_ERR(chan))
+ return chan;
+
dev_dbg(dev, "found DMA channel \"%s\" at index %d\n", name, index);
- return acpi_dma_request_slave_chan_by_index(dev, index);
+ return chan;
}
EXPORT_SYMBOL_GPL(acpi_dma_request_slave_chan_by_name);
--
2.7.0.rc3
--
To unsubscribe from this list: send the line "unsubscribe dmaengine" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
