From: Colin Ian King <colin.k...@canonical.com>
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 casting 1 to a u64 (the same type as started_channels) before shifting
it.
Signed-off-by: Colin Ian King <colin.k...@canonical.com>
---
drivers/dma/coh901318.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
index 2835f3e..98611e3 100644
--- a/drivers/dma/coh901318.c
+++ b/drivers/dma/coh901318.c
@@ -1353,7 +1353,7 @@ static ssize_t 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))
+ if (started_channels & ((u64)1 << i))
tmp += sprintf(tmp, "channel %d\n", i);
tmp += sprintf(tmp, "Pool alloc nbr %d\n", pool_count);
--
2.9.3
