---

yaml --- r: 158075 b: refs/heads/master c: b26e81b h: refs/heads/master i: 158073: 7d61423 158071: fc5f9a1 v: v3
git-mirror · Sep 3, 2009 · fc0e0e8 · fc0e0e8
1 parent 8b09d34
commit fc0e0e8
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Showing 3 changed files with 11 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: a345b23b79f1900e7d87c3165182504419180de4
+refs/heads/master: b26e81b871bd18184968f0bb3f12945906eadfce
diff --git a/trunk/arch/x86/include/asm/amd_iommu_types.h b/trunk/arch/x86/include/asm/amd_iommu_types.h
@@ -337,6 +337,9 @@ struct amd_iommu {
 	/* if one, we need to send a completion wait command */
 	bool need_sync;
 
+	/* becomes true if a command buffer reset is running */
+	bool reset_in_progress;
+
 	/* default dma_ops domain for that IOMMU */
 	struct dma_ops_domain *default_dom;
 };

diff --git a/trunk/arch/x86/kernel/amd_iommu.c b/trunk/arch/x86/kernel/amd_iommu.c
@@ -553,9 +553,16 @@ static void reset_iommu_command_buffer(struct amd_iommu *iommu)
 {
 	pr_err("AMD-Vi: Resetting IOMMU command buffer\n");
 
+	if (iommu->reset_in_progress)
+		panic("AMD-Vi: ILLEGAL_COMMAND_ERROR while resetting command buffer\n");
+
+	iommu->reset_in_progress = true;
+
 	amd_iommu_reset_cmd_buffer(iommu);
 	flush_all_devices_for_iommu(iommu);
 	flush_all_domains_on_iommu(iommu);
+
+	iommu->reset_in_progress = false;
 }
 
 /****************************************************************************