linux-kernel - [PATCH 2/4] iommu/omap: Set dev->archdata.iommu = NULL in omap_iommu_remove

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Date:   Fri,  7 Apr 2017 16:41:30 +0200
From:   Joerg Roedel <joro@...tes.org>
To:     Suman Anna <s-anna@...com>, iommu@...ts.linux-foundation.org
Cc:     linux-kernel@...r.kernel.org, Joerg Roedel <jroedel@...e.de>
Subject: [PATCH 2/4] iommu/omap: Set dev->archdata.iommu = NULL in omap_iommu_remove_device

From: Joerg Roedel <jroedel@...e.de>

Don't leave a stale pointer in case the device continues to
exist for some more time.

Signed-off-by: Joerg Roedel <jroedel@...e.de>
---
 drivers/iommu/omap-iommu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c
index e9c9b08..08bd731 100644
--- a/drivers/iommu/omap-iommu.c
+++ b/drivers/iommu/omap-iommu.c
@@ -1259,6 +1259,8 @@ static void omap_iommu_remove_device(struct device *dev)
 	if (!dev->of_node || !arch_data)
 		return;
 
+	dev->archdata.iommu = NULL;
+
 	kfree(arch_data->name);
 	kfree(arch_data);
 }
-- 
1.9.1