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of/base: Clean up exit paths for of_parse_phandle_with_args() 

Some of the exit paths were not correctly releasing the node. Fix it by
creating an 'err' label for collecting the error paths and releasing the
node.

Cc: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Grant Likely 2013-02-12 21:21:49 +00:00
parent cabb7d5b78
commit 23ce04c073
1 changed files with 19 additions and 7 deletions
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26
drivers/of/base.c
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@ -1096,7 +1096,7 @@ int of_parse_phandle_with_args(const struct device_node *np, const char *list_na
struct of_phandle_args *out_args)
{
const __be32 *list, *list_end;
int size, cur_index = 0;
int rc = 0, size, cur_index = 0;
uint32_t count = 0;
struct device_node *node = NULL;
phandle phandle;
@ -1109,6 +1109,7 @@ int of_parse_phandle_with_args(const struct device_node *np, const char *list_na
/* Loop over the phandles until all the requested entry is found */
while (list < list_end) {
rc = -EINVAL;
count = 0;
/*
@ -1125,13 +1126,13 @@ int of_parse_phandle_with_args(const struct device_node *np, const char *list_na
if (!node) {
pr_err("%s: could not find phandle\n",
np->full_name);
break;
goto err;
}
if (of_property_read_u32(node, cells_name, &count)) {
pr_err("%s: could not get %s for %s\n",
np->full_name, cells_name,
node->full_name);
break;
goto err;
}
/*
@ -1141,7 +1142,7 @@ int of_parse_phandle_with_args(const struct device_node *np, const char *list_na
if (list + count > list_end) {
pr_err("%s: arguments longer than property\n",
np->full_name);
break;
goto err;
}
}
@ -1151,9 +1152,10 @@ int of_parse_phandle_with_args(const struct device_node *np, const char *list_na
* index matches, then fill the out_args structure and return,
* or return -ENOENT for an empty entry.
*/
rc = -ENOENT;
if (cur_index == index) {
if (!phandle)
return -ENOENT;
goto err;
if (out_args) {
int i;
@ -1164,6 +1166,10 @@ int of_parse_phandle_with_args(const struct device_node *np, const char *list_na
for (i = 0; i < count; i++)
out_args->args[i] = be32_to_cpup(list++);
}
/* Found it! return success */
if (node)
of_node_put(node);
return 0;
}
@ -1173,10 +1179,16 @@ int of_parse_phandle_with_args(const struct device_node *np, const char *list_na
cur_index++;
}
/* Loop exited without finding a valid entry; return an error */
/*
* Unlock node before returning result; will be one of:
* -ENOENT : index is for empty phandle
* -EINVAL : parsing error on data
*/
rc = -ENOENT;
err:
if (node)
of_node_put(node);
return -EINVAL;
return rc;
}
EXPORT_SYMBOL(of_parse_phandle_with_args);