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Commit 23ce04c0 authored by Grant Likely's avatar Grant Likely
Browse files

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: default avatarGrant Likely <grant.likely@secretlab.ca>
parent cabb7d5b

drivers/of/base.c

+19 −7
Original line number Diff line number Diff line
@@ -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);