This is a note to let you know that I've just added the patch titled clk: rockchip: Initialize hw to error to avoid undefined behavior to the 5.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: clk-rockchip-initialize-hw-to-error-to-avoid-undefin.patch and it can be found in the queue-5.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit f9ae763ab8a94ce18e0a6388e23c5483cc5f7b49 Author: Stephen Boyd <sboyd@xxxxxxxxxx> Date: Wed Sep 23 17:41:44 2020 -0700 clk: rockchip: Initialize hw to error to avoid undefined behavior [ Upstream commit b608f11d49ec671739604cc763248d8e8fadbbeb ] 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@xxxxxxxxxxxxxx> Cc: Heiko Stuebner <heiko@xxxxxxxxx> Fixes: 956060a52795 ("clk: rockchip: add support for half divider") Reviewed-by: Heiko Stuebner <heiko@xxxxxxxxx> Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/clk/rockchip/clk-half-divider.c b/drivers/clk/rockchip/clk-half-divider.c index ba9f00dc9740c..7dd2e0b1a5866 100644 --- a/drivers/clk/rockchip/clk-half-divider.c +++ b/drivers/clk/rockchip/clk-half-divider.c @@ -167,7 +167,7 @@ struct clk *rockchip_clk_register_halfdiv(const char *name, unsigned long flags, spinlock_t *lock) { - struct clk *clk; + struct clk *clk = ERR_PTR(-ENOMEM); struct clk_mux *mux = NULL; struct clk_gate *gate = NULL; struct clk_divider *div = NULL;