From: Joerg Roedel <jroedel@suse.de>
Date: Tue, 9 Dec 2014 12:18:22 +0000 (+0100)
Subject: iommu/vt-d: Remove dead code in device_notifier
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=6d1b9cc9ee10374290583f69270e97de38128fb6;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

iommu/vt-d: Remove dead code in device_notifier

This code only runs when action == BUS_NOTIFY_REMOVED_DEVICE,
so it can't be BUS_NOTIFY_DEL_DEVICE.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
---

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 761012114fc7..40dfbc0444c0 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -4029,14 +4029,6 @@ static int device_notifier(struct notifier_block *nb,
 	if (action != BUS_NOTIFY_REMOVED_DEVICE)
 		return 0;
 
-	/*
-	 * If the device is still attached to a device driver we can't
-	 * tear down the domain yet as DMA mappings may still be in use.
-	 * Wait for the BUS_NOTIFY_UNBOUND_DRIVER event to do that.
-	 */
-	if (action == BUS_NOTIFY_DEL_DEVICE && dev->driver != NULL)
-		return 0;
-
 	domain = find_domain(dev);
 	if (!domain)
 		return 0;