[PATCH -next] spi: spi-fsl-qspi: Fix return value check in fsl_qspi_probe()

[Wei Yongjun <weiyongjun1@xxxxxxxxxx>]

In case of error, the function devm_ioremap() returns NULL pointer not
ERR_PTR(). The IS_ERR() test in the return value check should be
replaced with NULL test.

Fixes: 858e26a515c2 ("spi: spi-fsl-qspi: Reduce devm_ioremap size to 4 times AHB buffer size")
Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
---
 drivers/spi/spi-fsl-qspi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-fsl-qspi.c b/drivers/spi/spi-fsl-qspi.c
index 83eb8a484faf..6766262d7e75 100644
--- a/drivers/spi/spi-fsl-qspi.c
+++ b/drivers/spi/spi-fsl-qspi.c
@@ -880,8 +880,8 @@ static int fsl_qspi_probe(struct platform_device *pdev)
 	/* Since there are 4 cs, map size required is 4 times ahb_buf_size */
 	q->ahb_addr = devm_ioremap(dev, q->memmap_phy,
 				   (q->devtype_data->ahb_buf_size * 4));
-	if (IS_ERR(q->ahb_addr)) {
-		ret = PTR_ERR(q->ahb_addr);
+	if (!q->ahb_addr) {
+		ret = -ENOMEM;
 		goto err_put_ctrl;
 	}