input: touchscreen: mxs-lradc: use correct error check

From: Pan Bian
Date: Tue Aug 08 2017 - 09:01:37 EST


Function devm_ioremap() will return a NULL pointer on failure. However,
in function mxs_lradc_ts_probe(), its return value is checked with
IS_ERR(), which cannot detect the exceptional case.

Signed-off-by: Pan Bian <bianpan2016@xxxxxxx>
---
drivers/input/touchscreen/mxs-lradc-ts.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/input/touchscreen/mxs-lradc-ts.c b/drivers/input/touchscreen/mxs-lradc-ts.c
index 58c016c..9bcc98c6 100644
--- a/drivers/input/touchscreen/mxs-lradc-ts.c
+++ b/drivers/input/touchscreen/mxs-lradc-ts.c
@@ -631,8 +631,8 @@ static int mxs_lradc_ts_probe(struct platform_device *pdev)

iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
ts->base = devm_ioremap(dev, iores->start, resource_size(iores));
- if (IS_ERR(ts->base))
- return PTR_ERR(ts->base);
+ if (!ts->base)
+ return -ENOMEM;

ret = of_property_read_u32(node, "fsl,lradc-touchscreen-wires",
&ts_wires);
--
1.9.1