linux-kernel - [-next 3/5] PCI/sysfs: Use pci_is

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Date:   Wed, 30 Aug 2023 19:15:30 +0800
From:   Sui Jingfeng <sui.jingfeng@...ux.dev>
To:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Gerd Hoffmann <kraxel@...hat.com>,
        Gurchetan Singh <gurchetansingh@...omium.org>,
        Chia-I Wu <olvaffe@...il.com>
Cc:     dri-devel@...ts.freedesktop.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        Sui Jingfeng <suijingfeng@...ngson.cn>,
        "Maciej W. Rozycki" <macro@...am.me.uk>
Subject: [-next 3/5] PCI/sysfs: Use pci_is_vga() helper

From: Sui Jingfeng <suijingfeng@...ngson.cn>

Instead of accessing the PCI_CLASS_DISPLAY_VGA and pdev->class directly.
The PCI_CLASS_NOT_DEFINED_VGA is defined to provide backward compatibility
for devices that were built before the class code field was defined. It
should be visiable via sysfs(boot_vga) as the normal VGA-compatible devices.

Cc: "Maciej W. Rozycki" <macro@...am.me.uk>
Signed-off-by: Sui Jingfeng <suijingfeng@...ngson.cn>
---
 drivers/pci/pci-sysfs.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index d9eede2dbc0e..522708938563 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -1552,10 +1552,10 @@ static umode_t pci_dev_attrs_are_visible(struct kobject *kobj,
 	struct pci_dev *pdev = to_pci_dev(dev);
 
 	if (a == &dev_attr_boot_vga.attr)
-		if ((pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
-			return 0;
+		if (pci_is_vga(pdev))
+			return a->mode;
 
-	return a->mode;
+	return 0;
 }
 
 static struct attribute *pci_dev_hp_attrs[] = {
-- 
2.34.1