x86, vt-d: Handle previous faults after enabling fault handling
authorSuresh Siddha <suresh.b.siddha@intel.com>
Wed, 1 Dec 2010 06:22:29 +0000 (22:22 -0800)
committerH. Peter Anvin <hpa@linux.intel.com>
Tue, 14 Dec 2010 00:53:57 +0000 (16:53 -0800)
commit7f99d946e71e71d484b7543b49e990508e70d0c0
treee6e05d2fdb03474bf7135adb950de9a6d49519cf
parent7f7fbf45c6b748074546f7f16b9488ca71de99c1
x86, vt-d: Handle previous faults after enabling fault handling

Fault handling is getting enabled after enabling the interrupt-remapping (as
the success of interrupt-remapping can affect the apic mode and hence the
fault handling mode).

Hence there can potentially be some faults between the window of enabling
interrupt-remapping in the vt-d and the fault-handling of the vt-d units.

Handle any previous faults after enabling the vt-d fault handling.

For v2.6.38 cleanup, need to check if we can remove the dmar_fault() in the
enable_intr_remapping() and see if we can enable fault handling along with
enabling intr-remapping.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
LKML-Reference: <20101201062244.630417138@intel.com>
Cc: stable@kernel.org [v2.6.32+]
Acked-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
drivers/pci/dmar.c