Commit 34468613 authored by Shaoqin Huang's avatar Shaoqin Huang Committed by Michael S. Tsirkin
Browse files

virtio_pci: 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: <20221021062734.228881-2-shaoqin.huang@intel.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: default avatarPhilippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: default avatarXuan Zhuo <xuanzhuo@linux.alibaba.com>
parent 38fc462f

drivers/virtio/virtio_pci_modern.c

+1 −1
Original line number Diff line number Diff line
@@ -310,7 +310,7 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev, 
	if (!num || vp_modern_get_queue_enable(mdev, index))

		return ERR_PTR(-ENOENT);



	if (num & (num - 1)) {

	if (!is_power_of_2(num)) {

		dev_warn(&vp_dev->pci_dev->dev, "bad queue size %u", num);

		return ERR_PTR(-EINVAL);

	}