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virtio_ring: use helper function is_power_of_2()

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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@intel.com>
Message-Id: <20221021062734.228881-3-shaoqin.huang@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
This commit is contained in:
Shaoqin Huang
2022-10-20 23:27:34 -07:00
committed by Michael S. Tsirkin
parent 344686136d
commit b9d978a892
1 changed files with 1 additions and 1 deletions
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2
drivers/virtio/virtio_ring.c
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@@ -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;
}