iommu/rockchip: Don't feed NULL res pointers to devres

If we do, devres prints a "invalid resource" string in the error
loglevel.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index a6f593a0a29e..0253ab35c33b 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -1049,6 +1049,8 @@ static int rk_iommu_probe(struct platform_device *pdev)
 
         for (i = 0; i < pdev->num_resources; i++) {
                 res = platform_get_resource(pdev, IORESOURCE_MEM, i);
+                if (!res)
+                        continue;
                 iommu->bases[i] = devm_ioremap_resource(&pdev->dev, res);
                 if (IS_ERR(iommu->bases[i]))
                         continue;