spi: atmel: fix return value check in atmel_spi_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>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c
index 118a938776bd..273db0beb2b8 100644
--- a/drivers/spi/spi-atmel.c
+++ b/drivers/spi/spi-atmel.c
@@ -1547,8 +1547,10 @@ static int atmel_spi_probe(struct platform_device *pdev)
 
         as->pdev = pdev;
         as->regs = devm_ioremap_resource(&pdev->dev, regs);
-        if (!as->regs)
+        if (IS_ERR(as->regs)) {
+                ret = PTR_ERR(as->regs);
                 goto out_free_buffer;
+        }
         as->phybase = regs->start;
         as->irq = irq;
         as->clk = clk;