commit: 7f99d946e71e71d484b7543b49e990508e70d0c0 From: Suresh Siddha <[email protected]> Date: Tue, 30 Nov 2010 22:22:29 -0800 Subject: [PATCH] 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 <[email protected]> LKML-Reference: <[email protected]> Cc: [email protected] [v2.6.32+] Acked-by: Chris Wright <[email protected]> Signed-off-by: H. Peter Anvin <[email protected]> --- 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; _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
