[PATCH 3/5] drm/nouveau: Use pci_get_base_class() to reduce duplicated code

[Sui Jingfeng]

From: Sui Jingfeng <suijingfeng at loongson.cn>

Should be no functional change.

Cc: Ben Skeggs <bskeggs at redhat.com>
Cc: Karol Herbst <kherbst at redhat.com>
Cc: Lyude Paul <lyude at redhat.com>
Cc: David Airlie <airlied at gmail.com>
Cc: Daniel Vetter <daniel at ffwll.ch>
Signed-off-by: Sui Jingfeng <suijingfeng at loongson.cn>
---
 drivers/gpu/drm/nouveau/nouveau_acpi.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c
index a2ae8c21e4dc..8f0c69aad248 100644
--- a/drivers/gpu/drm/nouveau/nouveau_acpi.c
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c
@@ -284,14 +284,11 @@ static bool nouveau_dsm_detect(void)
 		printk("MXM: GUID detected in BIOS\n");
 
 	/* now do DSM detection */
-	while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
-		vga_count++;
-
-		nouveau_dsm_pci_probe(pdev, &dhandle, &has_mux, &has_optimus,
-				      &has_optimus_flags, &has_power_resources);
-	}
+	while ((pdev = pci_get_base_class(PCI_BASE_CLASS_DISPLAY, pdev))) {
+		if ((pdev->class != PCI_CLASS_DISPLAY_VGA << 8) &&
+		    (pdev->class != PCI_CLASS_DISPLAY_3D << 8))
+			continue;
 
-	while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_3D << 8, pdev)) != NULL) {
 		vga_count++;
 
 		nouveau_dsm_pci_probe(pdev, &dhandle, &has_mux, &has_optimus,
-- 
2.34.1