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virtio_pci: 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: <20221021062734.228881-2-shaoqin.huang@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
This commit is contained in:
Shaoqin Huang
2022-10-20 23:27:33 -07:00
committed by Michael S. Tsirkin
parent 38fc462f57
commit 344686136d
1 changed files with 1 additions and 1 deletions
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drivers/virtio/virtio_pci_modern.c
+1 -1
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@@ -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);
}