[PATCH] input: auo_pixcir_ts - add missing check for gpio

From: Radim Pavlik
Date: Thu Jan 07 2021 - 04:33:25 EST


The of_get_gpio() may return error, so check it immediately. The old
code might fail with EPROBE_DEFER which was masked by the
folowing gpio_is_valid() and returned EINVAL.

Signed-off-by: Radim Pavlik <radim.pavlik@xxxxxxxxxxxxxxxxxx>
---
drivers/input/touchscreen/auo-pixcir-ts.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/input/touchscreen/auo-pixcir-ts.c b/drivers/input/touchscreen/auo-pixcir-ts.c
index c33e63ca6142..8f3cfd743bdd 100644
--- a/drivers/input/touchscreen/auo-pixcir-ts.c
+++ b/drivers/input/touchscreen/auo-pixcir-ts.c
@@ -479,12 +479,16 @@ static struct auo_pixcir_ts_platdata *auo_pixcir_parse_dt(struct device *dev)
return ERR_PTR(-ENOMEM);

pdata->gpio_int = of_get_gpio(np, 0);
+ if (pdata->gpio_int < 0)
+ return ERR_PTR(pdata->gpio_int);
if (!gpio_is_valid(pdata->gpio_int)) {
dev_err(dev, "failed to get interrupt gpio\n");
return ERR_PTR(-EINVAL);
}

pdata->gpio_rst = of_get_gpio(np, 1);
+ if (pdata->gpio_rst < 0)
+ return ERR_PTR(pdata->gpio_rst);
if (!gpio_is_valid(pdata->gpio_rst)) {
dev_err(dev, "failed to get reset gpio\n");
return ERR_PTR(-EINVAL);
--
2.29.2