Commit 7aa8619a authored by Nate Watterson's avatar Nate Watterson Committed by Will Deacon
Browse files

iommu/arm-smmu-v3: Implement shutdown method 



The shutdown method disables the SMMU to avoid corrupting a new kernel
started with kexec.

Signed-off-by: default avatarNate Watterson <nwatters@codeaurora.org>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent aae4e7a8

drivers/iommu/arm-smmu-v3.c

+7 −0
Original line number Diff line number Diff line
@@ -2852,9 +2852,15 @@ static int arm_smmu_device_remove(struct platform_device *pdev) 
	struct arm_smmu_device *smmu = platform_get_drvdata(pdev);



	arm_smmu_device_disable(smmu);



	return 0;

}



static void arm_smmu_device_shutdown(struct platform_device *pdev)

{

	arm_smmu_device_remove(pdev);

}



static const struct of_device_id arm_smmu_of_match[] = {

	{ .compatible = "arm,smmu-v3", },

	{ },
@@ -2868,6 +2874,7 @@ static struct platform_driver arm_smmu_driver = { 
	},

	.probe	= arm_smmu_device_probe,

	.remove	= arm_smmu_device_remove,

	.shutdown = arm_smmu_device_shutdown,

};

module_platform_driver(arm_smmu_driver);

drivers/iommu/arm-smmu.c

+6 −0
Original line number Diff line number Diff line
@@ -2329,6 +2329,11 @@ static int arm_smmu_device_remove(struct platform_device *pdev) 
	return 0;

}



static void arm_smmu_device_shutdown(struct platform_device *pdev)

{

	arm_smmu_device_remove(pdev);

}



static struct platform_driver arm_smmu_driver = {

	.driver	= {

		.name		= "arm-smmu",
@@ -2336,6 +2341,7 @@ static struct platform_driver arm_smmu_driver = { 
	},

	.probe	= arm_smmu_device_probe,

	.remove	= arm_smmu_device_remove,

	.shutdown = arm_smmu_device_shutdown,

};

module_platform_driver(arm_smmu_driver);