diff options
| author | Andrew Lunn <andrew@lunn.ch> | 2012-11-18 14:44:56 +0400 |
|---|---|---|
| committer | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2012-11-20 18:59:01 +0400 |
| commit | 34c93c8657935d30649e777c4aa05f74f16aa418 (patch) | |
| tree | 8a5fbb6cf15677350fd8dd83689ba8c4545f6598 /drivers/dma/mv_xor.c | |
| parent | cd09fea446f485f1514ad444cb06a35e1dd63326 (diff) | |
| download | linux-34c93c8657935d30649e777c4aa05f74f16aa418.tar.xz | |
dma: mv_xor: Add a device_control function
The dmatest module for DMA engines calls
device_control(dtc->chan, DMA_TERMINATE_ALL, 0);
after completing the tests. The documentation in
include/linux/dmaengine.h suggests this function is optional and
dma_async_device_register() also does not BUG_ON() when not passed a
function. However, dmatest is not the only code in the kernel
unconditionally calling device_control. So add an implementation
indicating all operations are not implemented.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Diffstat (limited to 'drivers/dma/mv_xor.c')
| -rw-r--r-- | drivers/dma/mv_xor.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c index 97c8611f5ffb..f450fe8cbd61 100644 --- a/drivers/dma/mv_xor.c +++ b/drivers/dma/mv_xor.c @@ -1070,6 +1070,14 @@ out: return err; } +/* This driver does not implement any of the optional DMA operations. */ +static int +mv_xor_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, + unsigned long arg) +{ + return -ENOSYS; +} + static int mv_xor_channel_remove(struct mv_xor_chan *mv_chan) { struct dma_chan *chan, *_chan; @@ -1130,6 +1138,7 @@ mv_xor_channel_add(struct mv_xor_device *xordev, dma_dev->device_free_chan_resources = mv_xor_free_chan_resources; dma_dev->device_tx_status = mv_xor_status; dma_dev->device_issue_pending = mv_xor_issue_pending; + dma_dev->device_control = mv_xor_control; dma_dev->dev = &pdev->dev; /* set prep routines based on capability */ |