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author | Suresh Siddha <suresh.b.siddha@intel.com> | 2010-12-01 06:22:29 (GMT) |
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committer | H. Peter Anvin <hpa@linux.intel.com> | 2010-12-14 00:53:57 (GMT) |
commit | 7f99d946e71e71d484b7543b49e990508e70d0c0 (patch) | |
tree | e6e05d2fdb03474bf7135adb950de9a6d49519cf /drivers/pci/dmar.c | |
parent | 7f7fbf45c6b748074546f7f16b9488ca71de99c1 (diff) | |
download | linux-fsl-qoriq-7f99d946e71e71d484b7543b49e990508e70d0c0.tar.xz |
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>
Diffstat (limited to 'drivers/pci/dmar.c')
-rw-r--r-- | drivers/pci/dmar.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c index 0157708..09933eb 100644 --- a/drivers/pci/dmar.c +++ b/drivers/pci/dmar.c @@ -1417,6 +1417,11 @@ int __init enable_drhd_fault_handling(void) (unsigned long long)drhd->reg_base_addr, ret); return -1; } + + /* + * Clear any previous faults. + */ + dmar_fault(iommu->irq, iommu); } return 0; |