spi: fix return value check in dspi_probe()

In case of error, the function devm_ioremap_resource() returns
ERR_PTR() and never returns NULL. The NULL test in the return
value check should be replaced with IS_ERR().

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c
index 6cd07d13ecab3b5fc78c263cb6220a3b0ae4ddb5..4e44575bd87a9674c72338cafe25c1b5006ef529 100644 (file)
--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -476,15 +476,9 @@ static int dspi_probe(struct platform_device *pdev)
        master->bus_num = bus_num;
 
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       if (!res) {
-               dev_err(&pdev->dev, "can't get platform resource\n");
-               ret = -EINVAL;
-               goto out_master_put;
-       }
-
        dspi->base = devm_ioremap_resource(&pdev->dev, res);
-       if (!dspi->base) {
-               ret = -EINVAL;
+       if (IS_ERR(dspi->base)) {
+               ret = PTR_ERR(dspi->base);
                goto out_master_put;
        }