devm_ioremap_resource() doesn't return NULL, it returns error pointers.
Fixes: df7e762db5f6 ("dmaengine: Add STM32 DMAMUX driver")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
diff --git a/drivers/dma/stm32-dmamux.c b/drivers/dma/stm32-dmamux.c
index 22812e7a953b..d5db0f6e1ff8 100644
--- a/drivers/dma/stm32-dmamux.c
+++ b/drivers/dma/stm32-dmamux.c
@@ -257,8 +257,8 @@ static int stm32_dmamux_probe(struct platform_device *pdev)
return -ENODEV;
iomem = devm_ioremap_resource(&pdev->dev, res);
- if (!iomem)
- return -ENOMEM;
+ if (IS_ERR(iomem))
+ return PTR_ERR(iomem);
spin_lock_init(&stm32_dmamux->lock);
--
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