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https://github.com/AsahiLinux/u-boot
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15a2865515
of_property_match_string calls of_find_property to search for the
string property.
If the device node does not exist, of_find_property returns NULL, and
of_property_match_string returns -EINVAL, which is correct.
However, if the device node exists, but the property is not found,
of_find_property still returns NULL, but it will place -FDT_ERR_NOTFOUND
in the *lenp variable.
of_property_match_string does not use the lenp parameter, thus this error
case is being lost, and treated as if the node is NULL, and returns
-EINVAL, which is incorrect.
The callers of of_property_match_string treat the error differently if
the return value is -EINVAL or -ENOENT, e.g. in dwc3 driver:
ret = generic_phy_get_by_name(dev, "usb3-phy", &phy);
if (!ret) {
ret = generic_phy_init(&phy);
if (ret)
return ret;
} else if (ret != -ENOENT && ret != -ENODATA) {
debug("could not get phy (err %d)\n", ret);
return ret;
} else {
phy.dev = NULL;
}
So the caller drivers will just consider the property missing if -ENOENT
is returned, versus the case of -EINVAL, which means something else.
To fix this situation, changed the code to call the of_find_property
with the right third argument to catch this error code and treat it
accordingly.
Signed-off-by: Eugen Hristev <eugen.hristev@collabora.com>
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| .. | ||
| acpi.c | ||
| device-remove.c | ||
| device.c | ||
| devres.c | ||
| dump.c | ||
| fdtaddr.c | ||
| Kconfig | ||
| lists.c | ||
| Makefile | ||
| of_access.c | ||
| of_addr.c | ||
| of_extra.c | ||
| ofnode.c | ||
| read.c | ||
| read_extra.c | ||
| regmap.c | ||
| root.c | ||
| simple-bus.c | ||
| simple-pm-bus.c | ||
| syscon-uclass.c | ||
| tag.c | ||
| uclass.c | ||
| util.c | ||