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 <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 84da13c..5a40516 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -487,7 +487,6 @@
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 @@
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;
}