gpio/pca953x: Fix wrong pointer type
pca953x_get_alt_pdata() uses uint16_t* as result type for
of_get_property(), but numeric of values are __be32.
Checking for negative values is bogus because of-property
values are unsigned by definition.
Instead check for proper property size.
v3: - assume big-endian properties
- check property size
v2: - removed bogus check for negative property values
Signed-off-by: Dirk Eibach <eibach@gdsys.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/drivers/gpio/pca953x.c b/drivers/gpio/pca953x.c
index a261972..694b0f9 100644
--- a/drivers/gpio/pca953x.c
+++ b/drivers/gpio/pca953x.c
@@ -448,7 +448,8 @@
{
struct pca953x_platform_data *pdata;
struct device_node *node;
- const uint16_t *val;
+ const __be32 *val;
+ int size;
node = client->dev.of_node;
if (node == NULL)
@@ -461,13 +462,13 @@
}
pdata->gpio_base = -1;
- val = of_get_property(node, "linux,gpio-base", NULL);
+ val = of_get_property(node, "linux,gpio-base", &size);
if (val) {
- if (*val < 0)
- dev_warn(&client->dev,
- "invalid gpio-base in device tree\n");
+ if (size != sizeof(*val))
+ dev_warn(&client->dev, "%s: wrong linux,gpio-base\n",
+ node->full_name);
else
- pdata->gpio_base = *val;
+ pdata->gpio_base = be32_to_cpup(val);
}
val = of_get_property(node, "polarity", NULL);