PCI/VGA: Use pci_is_vga() to identify VGA devices

Use pci_is_vga() to identify VGA devices, so the arbiter will handle old
PCI_CLASS_NOT_DEFINED_VGA (0x0001) devices as well as the
PCI_CLASS_DISPLAY_VGA (0x0300) devices it previously handled.

Link: https://lore.kernel.org/r/20230830111532.444535-3-sui.jingfeng@linux.dev
Signed-off-by: Sui Jingfeng <suijingfeng@loongson.cn>
[bhelgaas: commit log, split functional change from optimization]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: "Maciej W. Rozycki" <macro@orcam.me.uk>

diff --git a/drivers/pci/vgaarb.c b/drivers/pci/vgaarb.c
index 5e6b1eb54c6432b988b86b1f7b30bdd965c17bfb..2ef3c88e9c33cfe343adb0d6d56a812ce74ffcbf 100644 (file)
--- a/drivers/pci/vgaarb.c
+++ b/drivers/pci/vgaarb.c
@@ -765,7 +765,7 @@ static bool vga_arbiter_add_pci_device(struct pci_dev *pdev)
        u16 cmd;
 
        /* Only deal with VGA class devices */
-       if ((pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
+       if (!pci_is_vga(pdev))
                return false;
 
        /* Allocate structure */