From: Sui Jingfeng <suijingfeng@xxxxxxxxxxx> VGAARB only cares about PCI(e) VGA devices, thus filtering out unqualified devices as early as possible. This also means that deleting a non-VGA device snooped won't unnecessarily call into vga_arbiter_del_pci_device() function. By using the newly implemented pci_is_vga(), PCI(e) with PCI_CLASS_NOT_DEFINED_VGA class code will also be handled. Cc: "Maciej W. Rozycki" <macro@xxxxxxxxxxx> Reviewed-by: Mario Limonciello <mario.limonciello@xxxxxxx> Signed-off-by: Sui Jingfeng <suijingfeng@xxxxxxxxxxx> --- drivers/pci/vgaarb.c | 19 +++++++++---------- 1 file changed, 9 insertions(+), 10 deletions(-) diff --git a/drivers/pci/vgaarb.c b/drivers/pci/vgaarb.c index 5e6b1eb54c64..ef8fe685de67 100644 --- a/drivers/pci/vgaarb.c +++ b/drivers/pci/vgaarb.c @@ -764,10 +764,6 @@ static bool vga_arbiter_add_pci_device(struct pci_dev *pdev) struct pci_dev *bridge; u16 cmd; - /* Only deal with VGA class devices */ - if ((pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA) - return false; - /* Allocate structure */ vgadev = kzalloc(sizeof(struct vga_device), GFP_KERNEL); if (vgadev == NULL) { @@ -1503,6 +1499,9 @@ static int pci_notify(struct notifier_block *nb, unsigned long action, vgaarb_dbg(dev, "%s\n", __func__); + if (!pci_is_vga(pdev)) + return 0; + /* * For now, we're only interested in devices added and removed. * I didn't test this thing here, so someone needs to double check @@ -1537,8 +1536,8 @@ static struct miscdevice vga_arb_device = { static int __init vga_arb_device_init(void) { + struct pci_dev *pdev = NULL; int rc; - struct pci_dev *pdev; rc = misc_register(&vga_arb_device); if (rc < 0) @@ -1547,11 +1546,11 @@ static int __init vga_arb_device_init(void) bus_register_notifier(&pci_bus_type, &pci_notifier); /* Add all VGA class PCI devices by default */ - pdev = NULL; - while ((pdev = - pci_get_subsys(PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, - PCI_ANY_ID, pdev)) != NULL) - vga_arbiter_add_pci_device(pdev); + do { + pdev = pci_get_subsys(PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, pdev); + if (pci_is_vga(pdev)) + vga_arbiter_add_pci_device(pdev); + } while (pdev); pr_info("loaded\n"); return rc; -- 2.34.1