From: Stephen Boyd <sboyd@kernel.org>
Date: Thu, 24 Sep 2020 00:41:44 +0000 (-0700)
Subject: clk: rockchip: Initialize hw to error to avoid undefined behavior
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b608f11d49ec671739604cc763248d8e8fadbbeb;p=linux.git

clk: rockchip: Initialize hw to error to avoid undefined behavior

We can get down to this return value from ERR_CAST() without
initializing hw. Set it to -ENOMEM so that we always return something
sane.

Fixes the following smatch warning:

drivers/clk/rockchip/clk-half-divider.c:228 rockchip_clk_register_halfdiv() error: uninitialized symbol 'hw'.
drivers/clk/rockchip/clk-half-divider.c:228 rockchip_clk_register_halfdiv() warn: passing zero to 'ERR_CAST'

Cc: Elaine Zhang <zhangqing@rock-chips.com>
Cc: Heiko Stuebner <heiko@sntech.de>
Fixes: 956060a52795 ("clk: rockchip: add support for half divider")
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
---

diff --git a/drivers/clk/rockchip/clk-half-divider.c b/drivers/clk/rockchip/clk-half-divider.c
index e97fd3dfbae76..ccd5c270c2132 100644
--- a/drivers/clk/rockchip/clk-half-divider.c
+++ b/drivers/clk/rockchip/clk-half-divider.c
@@ -166,7 +166,7 @@ struct clk *rockchip_clk_register_halfdiv(const char *name,
 					  unsigned long flags,
 					  spinlock_t *lock)
 {
-	struct clk_hw *hw;
+	struct clk_hw *hw = ERR_PTR(-ENOMEM);
 	struct clk_mux *mux = NULL;
 	struct clk_gate *gate = NULL;
 	struct clk_divider *div = NULL;