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dmaengine: coh901318: fix integer overflow when shifting more than 32 places 

Currently U300_DMA_CHANNELS is set to 40, meaning that the shift of 1 can
be more than 32 places, which leads to a 32 bit integer overflow. Fix this
by using 1ULL instead of 1 before shifting it.  Also add braces on the
for-loop to keep with coding style conventions.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Colin Ian King 2016-09-29 19:14:38 +01:00 committed by Vinod Koul
parent 2cc40ee7ae
commit 9f0df936b1
1 changed files with 3 additions and 2 deletions
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5
drivers/dma/coh901318.c
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@ -1352,9 +1352,10 @@ static int coh901318_debugfs_read(struct file *file, char __user *buf,
tmp += sprintf(tmp, "DMA -- enabled dma channels\n");
for (i = 0; i < U300_DMA_CHANNELS; i++)
if (started_channels & (1 << i))
for (i = 0; i < U300_DMA_CHANNELS; i++) {
if (started_channels & (1ULL << i))
tmp += sprintf(tmp, "channel %d\n", i);
}
tmp += sprintf(tmp, "Pool alloc nbr %d\n", pool_count);