diff options
author | Arnd Bergmann <arnd@arndb.de> | 2016-12-30 08:13:47 -0700 |
---|---|---|
committer | Sasha Levin <alexander.levin@verizon.com> | 2017-09-10 16:35:55 -0400 |
commit | e9064e99457063c49d4aab98131189edd2ffd468 (patch) | |
tree | 240ed36b7830183884c25923c3260a3b10bfa615 /drivers | |
parent | 245f3fe90e5fd0f6325a775650dc5826a411e63f (diff) |
vfio-pci: use 32-bit comparisons for register address for gcc-4.5
[ Upstream commit 45e869714489431625c569d21fc952428d761476 ]
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: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/vfio/pci/vfio_pci_rdwr.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/vfio/pci/vfio_pci_rdwr.c b/drivers/vfio/pci/vfio_pci_rdwr.c index 210db24d2204..4d39f7959adf 100644 --- a/drivers/vfio/pci/vfio_pci_rdwr.c +++ b/drivers/vfio/pci/vfio_pci_rdwr.c @@ -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); |