PCI: hv: Switch MSI descriptor locking to guard()

Convert the code to use the new guard(msi_descs_lock).

No functional change intended.

Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Jonathan Cameron <[email protected]>
Reviewed-by: Michael Kelley <[email protected]>
Acked-by: Wei Liu <[email protected]>
Acked-by: Bjorn Helgaas <[email protected]>
Link: https://lore.kernel.org/all/[email protected]

Author: KAGA-KOKO

drivers/pci/controller/pci-hyperv.c

@@ -3975,24 +3975,18 @@ static int hv_pci_restore_msi_msg(struct pci_dev *pdev, void *arg)
 {
 	struct irq_data *irq_data;
 	struct msi_desc *entry;
-	int ret = 0;
 
 	if (!pdev->msi_enabled && !pdev->msix_enabled)
 		return 0;
 
-	msi_lock_descs(&pdev->dev);
+	guard(msi_descs_lock)(&pdev->dev);
 	msi_for_each_desc(entry, &pdev->dev, MSI_DESC_ASSOCIATED) {
 		irq_data = irq_get_irq_data(entry->irq);
-		if (WARN_ON_ONCE(!irq_data)) {
-			ret = -EINVAL;
-			break;
-		}
-
+		if (WARN_ON_ONCE(!irq_data))
+			return -EINVAL;
 		hv_compose_msi_msg(irq_data, &entry->msg);
 	}
-	msi_unlock_descs(&pdev->dev);
-
-	return ret;
+	return 0;
 }
 
 /*