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authorColin Ian King <colin.king@canonical.com>2016-09-29 19:14:38 +0100
committerVinod Koul <vinod.koul@intel.com>2016-09-30 23:18:49 +0530
commit9f0df936b1b93a7fab5b9ed73009f43369c121ea (patch)
tree2ffa16bd0d3060553b282790183768e13b4d2a05 /drivers/dma
parent2cc40ee7ae30fa12c3ee3f18e6c0e81cced2cdcc (diff)
downloadlinux-9f0df936b1b93a7fab5b9ed73009f43369c121ea.tar.bz2
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>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/coh901318.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
index a373ecacfaba..5b1d4a39b30b 100644
--- a/drivers/dma/coh901318.c
+++ b/drivers/dma/coh901318.c
@@ -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);