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pinctrl: just return if no valid maps 

If there is a problem with a pinctrl node of a device,
for example, config child node do not have prop specified in
dt_params, num_maps maybe 0. On this condition, no need remember
this map.

Signed-off-by: lijiazi <lijiazi@xiaomi.com>
Link: https://lore.kernel.org/r/29421e7720443a2454830963186f00583c76ce1e.1572588550.git.lijiazi@xiaomi.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
lijiazi 2019-11-01 19:43:52 +08:00 committed by Linus Walleij
parent ee19835270
commit 6e4f3db8df
1 changed files with 10 additions and 0 deletions
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10
drivers/pinctrl/devicetree.c
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@ -162,6 +162,16 @@ static int dt_to_map_one_config(struct pinctrl *p,
ret = ops->dt_node_to_map(pctldev, np_config, &map, &num_maps);
if (ret < 0)
return ret;
else if (num_maps == 0) {
/*
* If we have no valid maps (maybe caused by empty pinctrl node
* or typing error) ther is no need remember this, so just
* return.
*/
dev_info(p->dev,
"there is not valid maps for state %s\n", statename);
return 0;
}
/* Stash the mapping table chunk away for later use */
return dt_remember_or_free_map(p, statename, pctldev, map, num_maps);