Commit-ID: 7f99d946e71e71d484b7543b49e990508e70d0c0 Gitweb: http://git.kernel.org/tip/7f99d946e71e71d484b7543b49e990508e70d0c0 Author: Suresh Siddha <suresh.b.siddha@xxxxxxxxx> AuthorDate: Tue, 30 Nov 2010 22:22:29 -0800 Committer: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx> CommitDate: Mon, 13 Dec 2010 16:53:57 -0800 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@xxxxxxxxx> LKML-Reference: <20101201062244.630417138@xxxxxxxxx> Cc: stable@xxxxxxxxxx [v2.6.32+] Acked-by: Chris Wright <chrisw@xxxxxxxxxxxx> Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx> --- 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; -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
|