From: Colin Ian King <colin.king@xxxxxxxxxxxxx> 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.king@xxxxxxxxxxxxx> --- 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 -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
