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media: v4l2-fwnode: link_frequency is an optional property

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v4l2_fwnode_endpoint_alloc_parse() is intended as a replacement for
v4l2_fwnode_endpoint_parse(). It parses the "link-frequency" property and
if the property isn't found, it returns an error. However,
"link-frequency" is an optional property and if it does not exist is not
an error. Instead, the number of link frequencies is simply zero in that
case.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Sakari Ailus 2017-06-20 09:14:43 -04:00 committed by Mauro Carvalho Chehab
parent 26d051e301
commit 06f8152027
1 changed files with 15 additions and 15 deletions
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30
drivers/media/v4l2-core/v4l2-fwnode.c
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@ -291,24 +291,24 @@ struct v4l2_fwnode_endpoint *v4l2_fwnode_endpoint_alloc_parse(
rval = fwnode_property_read_u64_array(fwnode, "link-frequencies",
NULL, 0);
if (rval < 0)
goto out_err;
if (rval > 0) {
vep->link_frequencies =
kmalloc_array(rval, sizeof(*vep->link_frequencies),
GFP_KERNEL);
if (!vep->link_frequencies) {
rval = -ENOMEM;
goto out_err;
}
vep->link_frequencies =
kmalloc_array(rval, sizeof(*vep->link_frequencies), GFP_KERNEL);
if (!vep->link_frequencies) {
rval = -ENOMEM;
goto out_err;
vep->nr_of_link_frequencies = rval;
rval = fwnode_property_read_u64_array(
fwnode, "link-frequencies", vep->link_frequencies,
vep->nr_of_link_frequencies);
if (rval < 0)
goto out_err;
}
vep->nr_of_link_frequencies = rval;
rval = fwnode_property_read_u64_array(fwnode, "link-frequencies",
vep->link_frequencies,
vep->nr_of_link_frequencies);
if (rval < 0)
goto out_err;
return vep;
out_err: