iommu/exynos: Fix error handling in exynos_iommu_init()

If platform_driver_register() fails, it don't need unregister and call
kmem_cache_free() to free the memory allocated before calling register.

Fixes: bbc4d20 ("iommu/exynos: Fix driver initialization sequence")
Signed-off-by: Yang Yingliang <[email protected]>
Reviewed-by: Sam Protsenko <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Joerg Roedel <[email protected]>

Author: Yang Yingliang

drivers/iommu/exynos-iommu.c

@@ -1446,7 +1446,7 @@ static int __init exynos_iommu_init(void)
 
 	return 0;
 err_reg_driver:
-	platform_driver_unregister(&exynos_sysmmu_driver);
+	kmem_cache_free(lv2table_kmem_cache, zero_lv2_table);
 err_zero_lv2:
 	kmem_cache_destroy(lv2table_kmem_cache);
 	return ret;