diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-21 09:23:55 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-21 09:23:55 +0200 |
| commit | 33f16b25a091687388152d4b29593a39d819aa22 (patch) | |
| tree | 34a8ef8acf3f14ca0e4f514756222876d00ff202 /drivers/iommu/intel/irq_remapping.c | |
| parent | 23f87274f0ad4a9167de23a330ed88966634fdf6 (diff) | |
| parent | ba4f184e126b751d1bffad5897f263108befc780 (diff) | |
Merge 5.9.0-rc6 into tty-next
We need the tty/serial fixes in here and this resolves a merge issue in
the 8250 driver.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/iommu/intel/irq_remapping.c')
| -rw-r--r-- | drivers/iommu/intel/irq_remapping.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c index 23583b0e66a5..8f4ce72570ce 100644 --- a/drivers/iommu/intel/irq_remapping.c +++ b/drivers/iommu/intel/irq_remapping.c @@ -508,12 +508,18 @@ static void iommu_enable_irq_remapping(struct intel_iommu *iommu) /* Enable interrupt-remapping */ iommu->gcmd |= DMA_GCMD_IRE; - iommu->gcmd &= ~DMA_GCMD_CFI; /* Block compatibility-format MSIs */ writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG); - IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, readl, (sts & DMA_GSTS_IRES), sts); + /* Block compatibility-format MSIs */ + if (sts & DMA_GSTS_CFIS) { + iommu->gcmd &= ~DMA_GCMD_CFI; + writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG); + IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, + readl, !(sts & DMA_GSTS_CFIS), sts); + } + /* * With CFI clear in the Global Command register, we should be * protected from dangerous (i.e. compatibility) interrupts |