If a device does not own a resource then we don't need to disable it. This resolves the case where an Intel IGD device can be configured to disable decode of VGA memory but we still need the arbiter to handle VGA I/O port routing. When the IGD device is in conflict, only PCI_COMMAND_IO should be disabled since VGA memory does not require arbitration on this device.
Signed-off-by: Alex Williamson <[email protected]> Cc: Dave Airlie <[email protected]> --- drivers/gpu/vga/vgaarb.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/vga/vgaarb.c b/drivers/gpu/vga/vgaarb.c index e893f6e..ea56471 100644 --- a/drivers/gpu/vga/vgaarb.c +++ b/drivers/gpu/vga/vgaarb.c @@ -257,9 +257,9 @@ static struct vga_device *__vga_tryget(struct vga_device *vgadev, if (!conflict->bridge_has_one_vga) { vga_irq_set_state(conflict, false); flags |= PCI_VGA_STATE_CHANGE_DECODES; - if (lwants & (VGA_RSRC_LEGACY_MEM|VGA_RSRC_NORMAL_MEM)) + if (match & (VGA_RSRC_LEGACY_MEM|VGA_RSRC_NORMAL_MEM)) pci_bits |= PCI_COMMAND_MEMORY; - if (lwants & (VGA_RSRC_LEGACY_IO|VGA_RSRC_NORMAL_IO)) + if (match & (VGA_RSRC_LEGACY_IO|VGA_RSRC_NORMAL_IO)) pci_bits |= PCI_COMMAND_IO; } @@ -267,11 +267,11 @@ static struct vga_device *__vga_tryget(struct vga_device *vgadev, flags |= PCI_VGA_STATE_CHANGE_BRIDGE; pci_set_vga_state(conflict->pdev, false, pci_bits, flags); - conflict->owns &= ~lwants; + conflict->owns &= ~match; /* If he also owned non-legacy, that is no longer the case */ - if (lwants & VGA_RSRC_LEGACY_MEM) + if (match & VGA_RSRC_LEGACY_MEM) conflict->owns &= ~VGA_RSRC_NORMAL_MEM; - if (lwants & VGA_RSRC_LEGACY_IO) + if (match & VGA_RSRC_LEGACY_IO) conflict->owns &= ~VGA_RSRC_NORMAL_IO; } _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
