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ARM: PL08x: prevent dma_set_runtime_config() reconfiguring memcpy channels

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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 <[email protected]>
Acked-by: Linus Walleij <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
This commit is contained in:
Russell King - ARM Linux 2011-01-03 22:46:17 +00:00 • committed by Dan Williams
commit b7f7586592
1 changed files with 3 additions and 0 deletions
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3
drivers/dma/amba-pl08x.c
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@ -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) {