From: Mitchel Humpherys <mitchelh@codeaurora.org>
Date: Wed, 19 Aug 2015 18:39:23 +0000 (-0700)
Subject: iommu/iommu-debug: Pass a flags value to iommu_trigger_fault
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=763858dfbc726b530b1cd5ab65e1bdf01ff6f2e6;p=sagit-ice-cold%2Fkernel_xiaomi_msm8998.git

iommu/iommu-debug: Pass a flags value to iommu_trigger_fault

iommu_trigger_fault now accepts a flags argument which can be handled by
the individual IOMMU drivers.  Take the value written to the debugfs
file by the user and pass it as the flags value.

Change-Id: I803e6585aea35fbb0f6e03e4279587b36a7bad92
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>
---

diff --git a/drivers/iommu/iommu-debug.c b/drivers/iommu/iommu-debug.c
index 78c566130717..3ce9b7c39291 100644
--- a/drivers/iommu/iommu-debug.c
+++ b/drivers/iommu/iommu-debug.c
@@ -94,8 +94,14 @@ static ssize_t iommu_debug_attachment_trigger_fault_write(
 	loff_t *offset)
 {
 	struct iommu_debug_attachment *attach = file->private_data;
+	unsigned long flags;
 
-	iommu_trigger_fault(attach->domain, 0);
+	if (kstrtoul_from_user(ubuf, count, 0, &flags)) {
+		pr_err("Invalid flags format\n");
+		return -EFAULT;
+	}
+
+	iommu_trigger_fault(attach->domain, flags);
 
 	return count;
 }