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[1/4] iommu/omap: Remove iopgtable_clear_entry_all() from driver remove

Message ID 1459809981-37984-2-git-send-email-s-anna@ti.com (mailing list archive)
State New, archived
Headers show

Commit Message

Suman Anna April 4, 2016, 10:46 p.m. UTC
The function iopgtable_clear_entry_all() is used for clearing all
the page table entries. These entries are neither created nor
initialized during the OMAP IOMMU driver probe, and are managed
only when a client device attaches to the IOMMU. So, there is no
need to invoke this function on a driver remove.

Removing this fixes a NULL pointer dereference crash if the IOMMU
device is unbound from the driver with no client device attached
to the IOMMU device.

Signed-off-by: Suman Anna <s-anna@ti.com>
---
 drivers/iommu/omap-iommu.c | 1 -
 1 file changed, 1 deletion(-)
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Patch

diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c
index 3dc5b65f3990..c05d48f88596 100644
--- a/drivers/iommu/omap-iommu.c
+++ b/drivers/iommu/omap-iommu.c
@@ -987,7 +987,6 @@  static int omap_iommu_remove(struct platform_device *pdev)
 {
 	struct omap_iommu *obj = platform_get_drvdata(pdev);
 
-	iopgtable_clear_entry_all(obj);
 	omap_iommu_debugfs_remove(obj);
 
 	pm_runtime_disable(obj->dev);