]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
x86, PAT, PCI: Change vma prot in pci_mmap to reflect inherited prot
authorPallipadi, Venkatesh <venkatesh.pallipadi@intel.com>
Mon, 23 Mar 2009 19:07:20 +0000 (12:07 -0700)
committerIngo Molnar <mingo@elte.hu>
Tue, 24 Mar 2009 09:42:35 +0000 (10:42 +0100)
commit9cdec049389ce2c324fd1ec508a71528a27d4a07
tree835f702631f2daeda8742c2784ee25018039d313
parent7f00a2495bf5b98b097c47be5d6e2d4114ec39bf
x86, PAT, PCI: Change vma prot in pci_mmap to reflect inherited prot

While looking at the issue in the thread:

  http://marc.info/?l=dri-devel&m=123606627824556&w=2

noticed a bug in pci PAT code and memory type setting.

PCI mmap code did not set the proper protection in vma, when it
inherited protection in reserve_memtype. This bug only affects
the case where there exists a WC mapping before X does an mmap
with /proc or /sys pci interface. This will cause X userlevel
mmap from /proc or /sysfs to fail on fork.

Reported-by: Kevin Winchester <kjwinchester@gmail.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Dave Airlie <airlied@redhat.com>
Cc: <stable@kernel.org>
LKML-Reference: <20090323190720.GA16831@linux-os.sc.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
arch/x86/pci/i386.c