[tip: irq/msi] PCI/sysfs: Use pci_irq_vector()

[tip-bot2 for Thomas Gleixner]

The following commit has been merged into the irq/msi branch of tip:

Commit-ID:     793c5006769d77b8148236bc124b75e391110531
Gitweb:        https://git.kernel.org/tip/793c5006769d77b8148236bc124b75e391110531
Author:        Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate:    Mon, 06 Dec 2021 23:27:36 +01:00
Committer:     Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Thu, 09 Dec 2021 11:52:21 +01:00

PCI/sysfs: Use pci_irq_vector()

instead of fiddling with MSI descriptors.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Tested-by: Juergen Gross <jgross@xxxxxxxx>
Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Acked-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20211206210224.265589103@xxxxxxxxxxxxx

---
 drivers/pci/pci-sysfs.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index cfe2f85..602f0fb 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -62,11 +62,8 @@ static ssize_t irq_show(struct device *dev,
 	 * For MSI, show the first MSI IRQ; for all other cases including
 	 * MSI-X, show the legacy INTx IRQ.
 	 */
-	if (pdev->msi_enabled) {
-		struct msi_desc *desc = first_pci_msi_entry(pdev);
-
-		return sysfs_emit(buf, "%u\n", desc->irq);
-	}
+	if (pdev->msi_enabled)
+		return sysfs_emit(buf, "%u\n", pci_irq_vector(pdev, 0));
 #endif
 
 	return sysfs_emit(buf, "%u\n", pdev->irq);