Commit b9d978a8 authored by Shaoqin Huang's avatar Shaoqin Huang Committed by Michael S. Tsirkin
Browse files

virtio_ring: use helper function is_power_of_2() 



Use helper function is_power_of_2() to check if num is power of two.
Minor readability improvement.

Signed-off-by: default avatarShaoqin Huang <shaoqin.huang@intel.com>
Message-Id: <20221021062734.228881-3-shaoqin.huang@intel.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: default avatarXuan Zhuo <xuanzhuo@linux.alibaba.com>
parent 34468613

drivers/virtio/virtio_ring.c

+1 −1
Original line number Diff line number Diff line
@@ -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;

	}