[PATCH V2] clk: keystone: sci-clk: fix application of sizeof to pointer

[PATCH V2] clk: keystone: sci-clk: fix application of sizeof to pointer

[Nishanth Menon]

From: Jing Yangyang <jing.yangyang@zte.com.cn>

Coccinelle (scripts/coccinelle/misc/noderef.cocci) reports:

  drivers/clk/keystone/sci-clk.c:391:8-14: ERROR: application of
  sizeof to pointer

In sci_clk_get(), 'clk' is declared as 'struct sci_clk **', so
sizeof(clk) is sizeof(struct sci_clk **) which is the size of a
pointer rather than the size of an array element. provider->clocks
is an array of 'struct sci_clk *', so the canonical size argument
to bsearch() is sizeof(*clk) (i.e. sizeof(struct sci_clk *)).

The two values are equal on every supported architecture, so this
is correctness/idiom, not a runtime fix, but the new form matches
the rest of the bsearch() callers in the tree and silences the
Coccinelle warning the script flagged.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Closes: https://lore.kernel.org/all/84a6ba16686347099a3dab2e5161a930e792eb6e.1629198281.git.jing.yangyang@zte.com.cn/
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Julia Lawall <julia.lawall@inria.fr>
Closes: https://lore.kernel.org/all/202512040525.zrHSDl5h-lkp@intel.com/
Link: https://lore.kernel.org/linux-clk/20211012021931.176727-1-davidcomponentone@gmail.com/
Reviewed-by: Stepan Ionichev <sozdayvek@gmail.com>
Reviewed-by: Andrew Davis <afd@ti.com>
Signed-off-by: Jing Yangyang <jing.yangyang@zte.com.cn>
Signed-off-by: David Yang <davidcomponentone@gmail.com>
[nm@ti.com: Improved commit message]
Signed-off-by: Nishanth Menon <nm@ti.com>
---
Changes in V2:
 - Picked up Stepan's suggestion on commit message
 - Picked up Andrew and Stepan's reviewed-by
V1: https://lore.kernel.org/all/20260508152321.3683799-1-nm@ti.com/

 drivers/clk/keystone/sci-clk.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/keystone/sci-clk.c b/drivers/clk/keystone/sci-clk.c
index 9d5071223f4c..2fc1f050779b 100644
--- a/drivers/clk/keystone/sci-clk.c
+++ b/drivers/clk/keystone/sci-clk.c
@@ -388,7 +388,7 @@ static struct clk_hw *sci_clk_get(struct of_phandle_args *clkspec, void *data)
 	key.clk_id = clkspec->args[1];
 
 	clk = bsearch(&key, provider->clocks, provider->num_clocks,
-		      sizeof(clk), _cmp_sci_clk);
+		      sizeof(*clk), _cmp_sci_clk);
 
 	if (!clk)
 		return ERR_PTR(-ENODEV);
-- 
2.32.0

Re: [PATCH V2] clk: keystone: sci-clk: fix application of sizeof to pointer

[Brian Masney]

On Tue, May 12, 2026 at 06:00:28AM -0500, Nishanth Menon wrote:
> From: Jing Yangyang <jing.yangyang@zte.com.cn>
> 
> Coccinelle (scripts/coccinelle/misc/noderef.cocci) reports:
> 
>   drivers/clk/keystone/sci-clk.c:391:8-14: ERROR: application of
>   sizeof to pointer
> 
> In sci_clk_get(), 'clk' is declared as 'struct sci_clk **', so
> sizeof(clk) is sizeof(struct sci_clk **) which is the size of a
> pointer rather than the size of an array element. provider->clocks
> is an array of 'struct sci_clk *', so the canonical size argument
> to bsearch() is sizeof(*clk) (i.e. sizeof(struct sci_clk *)).
> 
> The two values are equal on every supported architecture, so this
> is correctness/idiom, not a runtime fix, but the new form matches
> the rest of the bsearch() callers in the tree and silences the
> Coccinelle warning the script flagged.
> 
> Reported-by: Zeal Robot <zealci@zte.com.cn>
> Closes: https://lore.kernel.org/all/84a6ba16686347099a3dab2e5161a930e792eb6e.1629198281.git.jing.yangyang@zte.com.cn/
> Reported-by: kernel test robot <lkp@intel.com>
> Reported-by: Julia Lawall <julia.lawall@inria.fr>
> Closes: https://lore.kernel.org/all/202512040525.zrHSDl5h-lkp@intel.com/
> Link: https://lore.kernel.org/linux-clk/20211012021931.176727-1-davidcomponentone@gmail.com/
> Reviewed-by: Stepan Ionichev <sozdayvek@gmail.com>
> Reviewed-by: Andrew Davis <afd@ti.com>
> Signed-off-by: Jing Yangyang <jing.yangyang@zte.com.cn>
> Signed-off-by: David Yang <davidcomponentone@gmail.com>
> [nm@ti.com: Improved commit message]
> Signed-off-by: Nishanth Menon <nm@ti.com>

Reviewed-by: Brian Masney <bmasney@redhat.com>