diff options
| author | Colin Ian King <colin.king@canonical.com> | 2016-09-29 20:14:38 +0200 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2016-09-30 19:48:49 +0200 |
| commit | 9f0df936b1b93a7fab5b9ed73009f43369c121ea (patch) | |
| tree | 2ffa16bd0d3060553b282790183768e13b4d2a05 /drivers/dma/coh901318.c | |
| parent | dmaengine: edma: avoid uninitialized variable use (diff) | |
| download | linux-9f0df936b1b93a7fab5b9ed73009f43369c121ea.tar.xz linux-9f0df936b1b93a7fab5b9ed73009f43369c121ea.zip | |
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/coh901318.c')
| -rw-r--r-- | drivers/dma/coh901318.c | 5 |
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); |