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vfio/pci: Disable qword access to the VGA region

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Seems no reason to allow qword access to the old VGA resource. Better
restrict it to dword access as before.

Suggested-by: Alex Williamson <alex@shazbot.org>
Signed-off-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20251218081650.555015-3-kevin.tian@intel.com
Signed-off-by: Alex Williamson <alex@shazbot.org>
This commit is contained in:
Kevin Tian 2025-12-18 08:16:50 +00:00 committed by Alex Williamson
parent dc85a46928
commit 8bb808cea3
1 changed files with 1 additions and 1 deletions
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2
drivers/vfio/pci/vfio_pci_rdwr.c
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@ -363,7 +363,7 @@ ssize_t vfio_pci_vga_rw(struct vfio_pci_core_device *vdev, char __user *buf,
* to the memory enable bit in the command register.
*/
done = vfio_pci_core_do_io_rw(vdev, false, iomem, buf, off, count,
0, 0, iswrite, VFIO_PCI_IO_WIDTH_8);
0, 0, iswrite, VFIO_PCI_IO_WIDTH_4);
vga_put(vdev->pdev, rsrc);