ARM: S3C24XX: DMA: Use valid index when accessing array
The DMA_CH_VALID bit used in the channel index should be masked out before
using it to access the channel array.
Signed-off-by: Ramax Lo <ramaxlo@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
diff --git a/arch/arm/plat-s3c24xx/dma.c b/arch/arm/plat-s3c24xx/dma.c
index f65192d..f0ea794 100644
--- a/arch/arm/plat-s3c24xx/dma.c
+++ b/arch/arm/plat-s3c24xx/dma.c
@@ -1403,11 +1403,13 @@
ord = &dma_order->channels[channel];
for (ch = 0; ch < dma_channels; ch++) {
+ int tmp;
if (!is_channel_valid(ord->list[ch]))
continue;
- if (s3c2410_chans[ord->list[ch]].in_use == 0) {
- ch = ord->list[ch] & ~DMA_CH_VALID;
+ tmp = ord->list[ch] & ~DMA_CH_VALID;
+ if (s3c2410_chans[tmp].in_use == 0) {
+ ch = tmp;
goto found;
}
}