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authorChen-Yu Tsai <wens@csie.org>2016-11-11 10:35:10 +0800
committerLinus Walleij <linus.walleij@linaro.org>2016-11-15 10:15:04 +0100
commit88f01a1bd0e0dbd01b65907023dbe53cf524ea2a (patch)
treece492f589d54454807c123b4b9c5d14ae156071b /drivers/pinctrl/sunxi
parent23d511f6fe3fb7d869539abbd1c0638b745e6560 (diff)
downloadlinux-88f01a1bd0e0dbd01b65907023dbe53cf524ea2a.tar.bz2
pinctrl: sunxi: Free configs in pinctrl_map only if it is a config map
In the recently refactored sunxi pinctrl library, we are only allocating one set of pin configs for each pinmux setting node. When the pinctrl_map structure is freed, the pin configs should also be freed. However the code assumed the first map would contain the configs, which actually never happens, as the mux function map gets added first. The proper way to do this is to look through all the maps and free the first one whose type is actually PIN_MAP_TYPE_CONFIGS_GROUP. Also slightly expand the comment explaining this. Fixes: f233dbca6227 ("pinctrl: sunxi: Rework the pin config building code") Signed-off-by: Chen-Yu Tsai <wens@csie.org> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/sunxi')
-rw-r--r--drivers/pinctrl/sunxi/pinctrl-sunxi.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.c b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
index ebe2c73d211e..e199d95af8c0 100644
--- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c
+++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
@@ -408,8 +408,21 @@ static void sunxi_pctrl_dt_free_map(struct pinctrl_dev *pctldev,
struct pinctrl_map *map,
unsigned num_maps)
{
- /* All the maps have the same pin config, free only the first one */
- kfree(map[0].data.configs.configs);
+ int i;
+
+ /* pin config is never in the first map */
+ for (i = 1; i < num_maps; i++) {
+ if (map[i].type != PIN_MAP_TYPE_CONFIGS_GROUP)
+ continue;
+
+ /*
+ * All the maps share the same pin config,
+ * free only the first one we find.
+ */
+ kfree(map[i].data.configs.configs);
+ break;
+ }
+
kfree(map);
}