From 8e12188400668046870087fc278404a11c853061 Mon Sep 17 00:00:00 2001 From: Qiuxu Zhuo Date: Fri, 28 Apr 2017 01:16:15 +0800 Subject: [PATCH] iommu/vt-d: Don't print the failure message when booting non-kdump kernel When booting a new non-kdump kernel, we have below failure message: [ 0.004000] DMAR-IR: IRQ remapping was enabled on dmar2 but we are not in kdump mode [ 0.004000] DMAR-IR: Failed to copy IR table for dmar2 from previous kernel [ 0.004000] DMAR-IR: IRQ remapping was enabled on dmar1 but we are not in kdump mode [ 0.004000] DMAR-IR: Failed to copy IR table for dmar1 from previous kernel [ 0.004000] DMAR-IR: IRQ remapping was enabled on dmar0 but we are not in kdump mode [ 0.004000] DMAR-IR: Failed to copy IR table for dmar0 from previous kernel [ 0.004000] DMAR-IR: IRQ remapping was enabled on dmar3 but we are not in kdump mode [ 0.004000] DMAR-IR: Failed to copy IR table for dmar3 from previous kernel For non-kdump case, we no need to copy IR table from previous kernel so it's nonthing actually failed. To be less alarming or misleading, do not print "DMAR-IR: Failed to copy IR table for dmar[0-9] from previous kernel" messages when booting non-kdump kernel. Signed-off-by: Qiuxu Zhuo Signed-off-by: Joerg Roedel --- drivers/iommu/intel_irq_remapping.c | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-) diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c index ac596928f6b4..a190cbd76ef7 100644 --- a/drivers/iommu/intel_irq_remapping.c +++ b/drivers/iommu/intel_irq_remapping.c @@ -408,14 +408,6 @@ static int iommu_load_old_irte(struct intel_iommu *iommu) size_t size; u64 irta; - if (!is_kdump_kernel()) { - pr_warn("IRQ remapping was enabled on %s but we are not in kdump mode\n", - iommu->name); - clear_ir_pre_enabled(iommu); - iommu_disable_irq_remapping(iommu); - return -EINVAL; - } - /* Check whether the old ir-table has the same size as ours */ irta = dmar_readq(iommu->reg + DMAR_IRTA_REG); if ((irta & INTR_REMAP_TABLE_REG_SIZE_MASK) @@ -567,7 +559,12 @@ static int intel_setup_irq_remapping(struct intel_iommu *iommu) init_ir_status(iommu); if (ir_pre_enabled(iommu)) { - if (iommu_load_old_irte(iommu)) + if (!is_kdump_kernel()) { + pr_warn("IRQ remapping was enabled on %s but we are not in kdump mode\n", + iommu->name); + clear_ir_pre_enabled(iommu); + iommu_disable_irq_remapping(iommu); + } else if (iommu_load_old_irte(iommu)) pr_err("Failed to copy IR table for %s from previous kernel\n", iommu->name); else -- 2.20.1