ASoC: zx: i2s: Fix devm_ioremap_resource return value check

Value returned by devm_ioremap_resource() was checked for non-NULL but
devm_ioremap_resource() returns IOMEM_ERR_PTR, not NULL. In case of
error this could lead to dereference of ERR_PTR.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Reviewed-by: Jun Nie <jun.nie@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/sound/soc/zte/zx296702-i2s.c b/sound/soc/zte/zx296702-i2s.c
index 98d96e1b17e0..1930c42e1f55 100644
--- a/sound/soc/zte/zx296702-i2s.c
+++ b/sound/soc/zte/zx296702-i2s.c
@@ -393,9 +393,9 @@ static int zx_i2s_probe(struct platform_device *pdev)
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         zx_i2s->mapbase = res->start;
         zx_i2s->reg_base = devm_ioremap_resource(&pdev->dev, res);
-        if (!zx_i2s->reg_base) {
+        if (IS_ERR(zx_i2s->reg_base)) {
                 dev_err(&pdev->dev, "ioremap failed!\n");
-                return -EIO;
+                return PTR_ERR(zx_i2s->reg_base);
         }
 
         writel_relaxed(0, zx_i2s->reg_base + ZX_I2S_FIFO_CTRL);