iommu/exynos: Handle failed IOMMU device registration properly

[ Upstream commit fce398d2d02c0a9a2bedf7c7201b123e153e8963 ]

If iommu_device_register() fails in exynos_sysmmu_probe(), the previous
calls have to be cleaned up. In this case, the iommu_device_sysfs_add()
should be cleaned up, by calling its remove counterpart call.

Fixes: d2c302b6e8b1 ("iommu/exynos: Make use of iommu_device_register interface")
Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20220714165550.8884-3-semen.protsenko@linaro.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index 939ffa7..f96acc3 100644 (file)
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -630,7 +630,7 @@ static int exynos_sysmmu_probe(struct platform_device *pdev)
 
        ret = iommu_device_register(&data->iommu, &exynos_iommu_ops, dev);
        if (ret)
-               return ret;
+               goto err_iommu_register;
 
        platform_set_drvdata(pdev, data);
 
@@ -657,6 +657,10 @@ static int exynos_sysmmu_probe(struct platform_device *pdev)
        pm_runtime_enable(dev);
 
        return 0;
+
+err_iommu_register:
+       iommu_device_sysfs_remove(&data->iommu);
+       return ret;
 }
 
 static int __maybe_unused exynos_sysmmu_suspend(struct device *dev)