iommu/arm-smmu-v3: Convert to platform remove callback returning void

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230321084125.337021-4-u.kleine-koenig@pengutronix.de
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index f2425b0f0cd6252ba284576a5c77d45c05dbe401..d99e1a8dbe44dcc88fcfba42a2a672785fe8d9fa 100644 (file)
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -3844,7 +3844,7 @@ static int arm_smmu_device_probe(struct platform_device *pdev)
        return 0;
 }
 
-static int arm_smmu_device_remove(struct platform_device *pdev)
+static void arm_smmu_device_remove(struct platform_device *pdev)
 {
        struct arm_smmu_device *smmu = platform_get_drvdata(pdev);
 
@@ -3852,8 +3852,6 @@ static int arm_smmu_device_remove(struct platform_device *pdev)
        iommu_device_sysfs_remove(&smmu->iommu);
        arm_smmu_device_disable(smmu);
        iopf_queue_free(smmu->evtq.iopf);
-
-       return 0;
 }
 
 static void arm_smmu_device_shutdown(struct platform_device *pdev)
@@ -3882,7 +3880,7 @@ static struct platform_driver arm_smmu_driver = {
                .suppress_bind_attrs    = true,
        },
        .probe  = arm_smmu_device_probe,
-       .remove = arm_smmu_device_remove,
+       .remove_new = arm_smmu_device_remove,
        .shutdown = arm_smmu_device_shutdown,
 };
 module_driver(arm_smmu_driver, platform_driver_register,