Messages in this thread Patch in this message |  | | Date | Mon, 8 Jun 2015 06:45:55 -0700 | From | tip-bot for Feng Wu <> | Subject | [tip:x86/apic] iommu, x86: Properly handle posted interrupts for IOMMU hotplug |
| |
Commit-ID: 5bce3c4c68c7d86f8742c9e25814238975563bae Gitweb: http://git.kernel.org/tip/5bce3c4c68c7d86f8742c9e25814238975563bae Author: Feng Wu <feng.wu@intel.com> AuthorDate: Fri, 5 Jun 2015 13:42:54 +0800 Committer: Thomas Gleixner <tglx@linutronix.de> CommitDate: Mon, 8 Jun 2015 15:41:33 +0200
iommu, x86: Properly handle posted interrupts for IOMMU hotplug
Return error when inserting a new IOMMU which doesn't support posted interrupts if posted interrupts are already enabled.
Signed-off-by: Feng Wu <feng.wu@intel.com> Acked-by: Joerg Roedel <joro@8bytes.org> Cc: jiang.liu@linux.intel.com Cc: iommu@lists.linux-foundation.org Cc: dwmw2@infradead.org Link: http://lkml.kernel.org/r/1433482974-14614-10-git-send-email-feng.wu@intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> --- drivers/iommu/intel_irq_remapping.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c index 0f57af7..80f1d14 100644 --- a/drivers/iommu/intel_irq_remapping.c +++ b/drivers/iommu/intel_irq_remapping.c @@ -1355,6 +1355,9 @@ int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert) return -EINVAL; if (!ecap_ir_support(iommu->ecap)) return 0; + if (irq_remapping_cap(IRQ_POSTING_CAP) && + !cap_pi_support(iommu->cap)) + return -EBUSY; if (insert) { if (!iommu->ir_table)
|  |