PCI/MSI: Use irq_get_msi_desc() to simplify code

Use irq_get_msi_desc() to get MSI IRQ related msi_desc directly instead of searching the dev->msi_list. Signed-off-by: Yijing Wang <[email protected]> Signed-off-by: Bjorn Helgaas <[email protected]>
rtvt123 · Jul 16, 2014 · e11ece5 · e11ece5
1 parent 0dae508
commit e11ece5
Showing 1 changed file with 5 additions and 7 deletions.
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
@@ -487,7 +487,6 @@ EXPORT_SYMBOL_GPL(pci_restore_msi_state);
 static ssize_t msi_mode_show(struct device *dev, struct device_attribute *attr,
 			     char *buf)
 {
-	struct pci_dev *pdev = to_pci_dev(dev);
 	struct msi_desc *entry;
 	unsigned long irq;
 	int retval;
@@ -496,12 +495,11 @@ static ssize_t msi_mode_show(struct device *dev, struct device_attribute *attr,
 	if (retval)
 		return retval;
 
-	list_for_each_entry(entry, &pdev->msi_list, list) {
-		if (entry->irq == irq) {
-			return sprintf(buf, "%s\n",
-				       entry->msi_attrib.is_msix ? "msix" : "msi");
-		}
-	}
+	entry = irq_get_msi_desc(irq);
+	if (entry)
+		return sprintf(buf, "%s\n",
+				entry->msi_attrib.is_msix ? "msix" : "msi");
+
 	return -ENODEV;
 }