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Message-Id: <1457391064-6660-21-git-send-email-kamal@canonical.com> Date: Mon, 7 Mar 2016 14:46:51 -0800 From: Kamal Mostafa <kamal@...onical.com> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org, kernel-team@...ts.ubuntu.com Cc: CQ Tang <cq.tang@...el.com>, David Woodhouse <David.Woodhouse@...el.com>, Kamal Mostafa <kamal@...onical.com> Subject: [PATCH 4.2.y-ckt 020/273] iommu/vt-d: Fix 64-bit accesses to 32-bit DMAR_GSTS_REG 4.2.8-ckt5 -stable review patch. If anyone has any objections, please let me know. ---8<------------------------------------------------------------ From: CQ Tang <cq.tang@...el.com> commit fda3bec12d0979aae3f02ee645913d66fbc8a26e upstream. This is a 32-bit register. Apparently harmless on real hardware, but causing justified warnings in simulation. Signed-off-by: CQ Tang <cq.tang@...el.com> Signed-off-by: David Woodhouse <David.Woodhouse@...el.com> Signed-off-by: Kamal Mostafa <kamal@...onical.com> --- drivers/iommu/dmar.c | 2 +- drivers/iommu/intel_irq_remapping.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c index c9db04d..b526875 100644 --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -1342,7 +1342,7 @@ void dmar_disable_qi(struct intel_iommu *iommu) raw_spin_lock_irqsave(&iommu->register_lock, flags); - sts = dmar_readq(iommu->reg + DMAR_GSTS_REG); + sts = readl(iommu->reg + DMAR_GSTS_REG); if (!(sts & DMA_GSTS_QIES)) goto end; diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c index f15692a..e360b86 100644 --- a/drivers/iommu/intel_irq_remapping.c +++ b/drivers/iommu/intel_irq_remapping.c @@ -609,7 +609,7 @@ static void iommu_disable_irq_remapping(struct intel_iommu *iommu) raw_spin_lock_irqsave(&iommu->register_lock, flags); - sts = dmar_readq(iommu->reg + DMAR_GSTS_REG); + sts = readl(iommu->reg + DMAR_GSTS_REG); if (!(sts & DMA_GSTS_IRES)) goto end; -- 2.7.0
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