From 1648237dc2053bfd6ade3ce3dca3716d53cf9dcf Mon Sep 17 00:00:00 2001 From: Dirk Eibach Date: Thu, 24 Feb 2011 10:20:43 +0100 Subject: [PATCH] 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 Signed-off-by: Grant Likely --- drivers/gpio/pca953x.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/gpio/pca953x.c b/drivers/gpio/pca953x.c index a261972f603d..694b0f9c4b6c 100644 --- a/drivers/gpio/pca953x.c +++ b/drivers/gpio/pca953x.c @@ -448,7 +448,8 @@ pca953x_get_alt_pdata(struct i2c_client *client) { 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 @@ pca953x_get_alt_pdata(struct i2c_client *client) } 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); -- 2.20.1