From: Stephen Boyd <sboyd@kernel.org>
To: Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org,
Elaine Zhang <zhangqing@rock-chips.com>,
Heiko Stuebner <heiko@sntech.de>
Subject: [PATCH] clk: rockchip: Initialize hw to error to avoid undefined behavior
Date: Wed, 23 Sep 2020 17:44:41 -0700 [thread overview]
Message-ID: <20200924004441.1476015-1-sboyd@kernel.org> (raw)
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")
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
---
drivers/clk/rockchip/clk-half-divider.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/clk/rockchip/clk-half-divider.c b/drivers/clk/rockchip/clk-half-divider.c
index e97fd3dfbae7..ccd5c270c213 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;
base-commit: ca52a47af60f791b08a540a8e14d8f5751ee63e9
--
https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git/
next reply other threads:[~2020-09-24 0:44 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-24 0:44 Stephen Boyd [this message]
2020-09-24 6:41 ` [PATCH] clk: rockchip: Initialize hw to error to avoid undefined behavior Heiko Stübner
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