[coreboot-gerrit] Change in coreboot[master]: lib/gpio.c: Validate num_gpio

[Richard Spiegel (Code Review)]

Richard Spiegel has uploaded this change for review. ( https://review.coreboot.org/28249

Change subject: lib/gpio.c: Validate num_gpio
......................................................................

lib/gpio.c: Validate num_gpio

In function _gpio_base3_value(), if num_gpio is 0 it'll cause the return
of an undefined value, as no for loop will be executed. Assert that it's
not 0.

BUG=b:112253891
TEST=Build and boot grunt.

Change-Id: I2b6537900fa41ebbee0171959f3ce236d360bc80
Signed-off-by: Richard Spiegel 
---
M src/lib/gpio.c
1 file changed, 1 insertion(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/49/28249/1

diff --git a/src/lib/gpio.c b/src/lib/gpio.c
index 0656dfb..482f62d 100644
--- a/src/lib/gpio.c
+++ b/src/lib/gpio.c
@@ -82,7 +82,7 @@
    int index;
    int temp;
    char value[32];
-	assert(num_gpio <= 32);
+	assert((num_gpio <= 32) && (num_gpio > 0));

/* Enable internal pull up */
    for (index = 0; index < num_gpio; ++index)