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pinctrl: lpc18xx: ensure ngroups is initialized at correct place 

The initialization of ngroups is occurring at the end of the
first iteration of the outer loop, which means that the
assignment  pins[ngroups++] = i is potentially indexing into
a region outside of array pins because ngroups is not initialized.
Instead, initialize ngroups in the inner loop before the first
inner loop iteration.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Joachim Eastwood <manabian@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Colin Ian King 2016-02-24 17:32:50 +00:00 committed by Linus Walleij
parent 35cec70720
commit 5e9a207547
1 changed files with 2 additions and 3 deletions
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5
drivers/pinctrl/pinctrl-lpc18xx.c
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@ -1170,9 +1170,8 @@ static int lpc18xx_create_group_func_map(struct device *dev,
u16 pins[ARRAY_SIZE(lpc18xx_pins)];
int func, ngroups, i;
for (func = 0; func < FUNC_MAX; ngroups = 0, func++) {
for (i = 0; i < ARRAY_SIZE(lpc18xx_pins); i++) {
for (func = 0; func < FUNC_MAX; func++) {
for (ngroups = 0, i = 0; i < ARRAY_SIZE(lpc18xx_pins); i++) {
if (lpc18xx_valid_pin_function(i, func))
pins[ngroups++] = i;
}