leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

AMD IOMMU: panic if completion wait loop fails

Browse Source 
Impact: prevents data corruption after a failed completion wait loop

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2008-12-17 16:36:44 +01:00
parent cf558d25e5
commit 84df817595
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/x86/kernel/amd_iommu.c
View File

@ -235,8 +235,9 @@ static int iommu_completion_wait(struct amd_iommu *iommu)
status &= ~MMIO_STATUS_COM_WAIT_INT_MASK;
writel(status, iommu->mmio_base + MMIO_STATUS_OFFSET);
if (unlikely((i == EXIT_LOOP_COUNT) && printk_ratelimit()))
printk(KERN_WARNING "AMD IOMMU: Completion wait loop failed\n");
if (unlikely(i == EXIT_LOOP_COUNT))
panic("AMD IOMMU: Completion wait loop failed\n");
out:
spin_unlock_irqrestore(&iommu->lock, flags);