diff options
| author |   Russell King - ARM Linux <linux@arm.linux.org.uk> | 2011-01-03 22:46:17 +0000 |
|---|---|---|
| committer |   Dan Williams <dan.j.williams@intel.com> | 2011-01-04 19:16:14 -0800 |
| commit | b7f758659265c173380b792862aaad1c23c0e004 (patch) | |
| tree | b67550bae43e48026c00284a9a64257ef11aae43 /drivers/dma | |
| parent | ARM: PL08x: allow dma_set_runtime_config() to return errors (diff) | |
| download | linux-dev-b7f758659265c173380b792862aaad1c23c0e004.tar.xz linux-dev-b7f758659265c173380b792862aaad1c23c0e004.zip | |
ARM: PL08x: prevent dma_set_runtime_config() reconfiguring memcpy channels
Prevent dma_set_runtime_config() being used to alter the configuration
supplied by the platform for memcpy channel configuration. No one
should be trying to change this configuration.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/amba-pl08x.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c index c7f7b82f6155..bebc678ed4fc 100644 --- a/drivers/dma/amba-pl08x.c +++ b/drivers/dma/amba-pl08x.c @@ -1129,6 +1129,9 @@ static int dma_set_runtime_config(struct dma_chan *chan, u32 cctl = 0; int i; + if (!plchan->slave) + return -EINVAL; + /* Transfer direction */ plchan->runtime_direction = config->direction; if (config->direction == DMA_TO_DEVICE) { |