From: Shaoqin Huang <shaoqin.huang@xxxxxxxxx>
Use helper function is_power_of_2() to check if num is power of two.
Minor readability improvement.
Signed-off-by: Shaoqin Huang <shaoqin.huang@xxxxxxxxx>
---
drivers/virtio/virtio_ring.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 2e7689bb933b..723c4e29e1d3 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -1052,7 +1052,7 @@ static int vring_alloc_queue_split(struct vring_virtqueue_split *vring_split,
dma_addr_t dma_addr;
/* We assume num is a power of 2. */
- if (num & (num - 1)) {
+ if (!is_power_of_2(num)) {
dev_warn(&vdev->dev, "Bad virtqueue length %u\n", num);
return -EINVAL;
}
--
2.34.1
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