aboutsummaryrefslogtreecommitdiffstats
path: root/arch
diff options
context:
space:
mode:
authorJoerg Roedel <joerg.roedel@amd.com>2008-12-17 10:36:44 -0500
committerJoerg Roedel <joerg.roedel@amd.com>2008-12-17 10:36:44 -0500
commit84df81759590ad16b0024cf46b3423cca76b2e07 (patch)
treead2e21daa3960753dbb3a8c6793d0f6242c063b5 /arch
parentcf558d25e5c9f70fa0279c9b7b8b4aed7cae9bd4 (diff)
AMD IOMMU: panic if completion wait loop fails
Impact: prevents data corruption after a failed completion wait loop Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/amd_iommu.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index a7b6dec6fc3f..0a60d60ed036 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -235,8 +235,9 @@ static int iommu_completion_wait(struct amd_iommu *iommu)
235 status &= ~MMIO_STATUS_COM_WAIT_INT_MASK; 235 status &= ~MMIO_STATUS_COM_WAIT_INT_MASK;
236 writel(status, iommu->mmio_base + MMIO_STATUS_OFFSET); 236 writel(status, iommu->mmio_base + MMIO_STATUS_OFFSET);
237 237
238 if (unlikely((i == EXIT_LOOP_COUNT) && printk_ratelimit())) 238 if (unlikely(i == EXIT_LOOP_COUNT))
239 printk(KERN_WARNING "AMD IOMMU: Completion wait loop failed\n"); 239 panic("AMD IOMMU: Completion wait loop failed\n");
240
240out: 241out:
241 spin_unlock_irqrestore(&iommu->lock, flags); 242 spin_unlock_irqrestore(&iommu->lock, flags);
242 243