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| author | Feng Wu <feng.wu@intel.com> | 2015-06-09 13:20:37 +0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2015-06-12 11:33:52 +0200 |
| commit | c1d993341e46867af9412cf7f93f535895bbe3a7 (patch) | |
| tree | 95f87632030df741b88ff13dc9d42c0778af7682 | |
| parent | 959c870f7305be019d9316bc4e038dc6119d51ad (diff) | |
| download | op-kernel-dev-c1d993341e46867af9412cf7f93f535895bbe3a7.zip op-kernel-dev-c1d993341e46867af9412cf7f93f535895bbe3a7.tar.gz | |
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>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
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/1433827237-3382-11-git-send-email-feng.wu@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | drivers/iommu/intel_irq_remapping.c | 3 |
1 files changed, 3 insertions, 0 deletions
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) |
