Commit e9064e99 authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Sasha Levin

vfio-pci: use 32-bit comparisons for register address for gcc-4.5

[ Upstream commit 45e86971 ]

Using ancient compilers (gcc-4.5 or older) on ARM, we get a link
failure with the vfio-pci driver:

ERROR: "__aeabi_lcmp" [drivers/vfio/pci/vfio-pci.ko] undefined!

The reason is that the compiler tries to do a comparison of
a 64-bit range. This changes it to convert to a 32-bit number
explicitly first, as newer compilers do for themselves.
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
Signed-off-by: default avatarSasha Levin <alexander.levin@verizon.com>
parent 245f3fe9
......@@ -190,7 +190,10 @@ ssize_t vfio_pci_vga_rw(struct vfio_pci_device *vdev, char __user *buf,
if (!vdev->has_vga)
return -EINVAL;
switch (pos) {
if (pos > 0xbfffful)
return -EINVAL;
switch ((u32)pos) {
case 0xa0000 ... 0xbffff:
count = min(count, (size_t)(0xc0000 - pos));
iomem = ioremap_nocache(0xa0000, 0xbffff - 0xa0000 + 1);
......
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