[PATCH] iommu/mediatek: fix a reversed test in probe

[Dan Carpenter]

The dma_set_mask() function returns negative error codes on failure but
this code is testing for zero instead.

Fixes: f4b49c7c5e67 ("iommu/mediatek: Set dma_mask for PGTABLE_PA_35_EN")
Signed-off-by: Dan Carpenter <error27 at gmail.com>
---
 drivers/iommu/mtk_iommu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 1a75b4382a92..6a00ce208dc2 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -1260,7 +1260,7 @@ static int mtk_iommu_probe(struct platform_device *pdev)
 
 	if (MTK_IOMMU_HAS_FLAG(data->plat_data, PGTABLE_PA_35_EN)) {
 		ret = dma_set_mask(dev, DMA_BIT_MASK(35));
-		if (!ret) {
+		if (ret) {
 			dev_err(dev, "Failed to set dma_mask 35.\n");
 			return ret;
 		}
-- 
2.39.1