From: Stephen Boyd <sboyd@codeaurora.org>
Date: Mon, 6 Jul 2015 23:48:19 +0000 (-0700)
Subject: clk: Check for allocation errors in of_clk_init()
X-Git-Tag: v4.3-rc1~144^2~108
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2e3b19f137f31290979999ff7ac67ce52e02be0e;p=karo-tx-linux.git

clk: Check for allocation errors in of_clk_init()

Dan Carpenter reports that we don't check the allocation here for
failure. Add a failure check and free any previously allocated
providers from the clk_provider_list.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
---

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index ddb4b541016f..705156828a7a 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -3112,8 +3112,17 @@ void __init of_clk_init(const struct of_device_id *matches)
 
 	/* First prepare the list of the clocks providers */
 	for_each_matching_node_and_match(np, matches, &match) {
-		struct clock_provider *parent =
-			kzalloc(sizeof(struct clock_provider),	GFP_KERNEL);
+		struct clock_provider *parent;
+
+		parent = kzalloc(sizeof(*parent), GFP_KERNEL);
+		if (!parent) {
+			list_for_each_entry_safe(clk_provider, next,
+						 &clk_provider_list, node) {
+				list_del(&clk_provider->node);
+				kfree(clk_provider);
+			}
+			return;
+		}
 
 		parent->clk_init_cb = match->data;
 		parent->np = np;