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| author |   lijiazi <jqqlijiazi@gmail.com> | 2019-11-01 19:43:52 +0800 |
|---|---|---|
| committer |   Linus Walleij <linus.walleij@linaro.org> | 2019-11-05 11:25:39 +0100 |
| commit | 6e4f3db8dfcf6c4126232086251a31db364503e1 (patch) | |
| tree | 74e0329be95309144b857521257d54b9b0e785cb /drivers | |
| parent | dt-bindings: pinctrl: qcom-pmic-mpp: Add support for PM/PMI8950 (diff) | |
| download | linux-dev-6e4f3db8dfcf6c4126232086251a31db364503e1.tar.xz linux-dev-6e4f3db8dfcf6c4126232086251a31db364503e1.zip | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/pinctrl/devicetree.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/pinctrl/devicetree.c b/drivers/pinctrl/devicetree.c index 1a300374a16d..674920daac26 100644 --- a/drivers/pinctrl/devicetree.c +++ b/drivers/pinctrl/devicetree.c @@ -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); |