linux-kernel - Re: [PATCH] misc: mei: client.c: fix some error code problem in mei_cl

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Date:   Mon, 20 Nov 2023 10:14:38 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Su Hui <suhui@...china.com>
Cc:     tomas.winkler@...el.com, arnd@...db.de, nathan@...nel.org,
        ndesaulniers@...gle.com, trix@...hat.com,
        alexander.usyskin@...el.com, linux-kernel@...r.kernel.org,
        llvm@...ts.linux.dev, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] misc: mei: client.c: fix some error code problem in
 mei_cl_write

On Mon, Nov 20, 2023 at 04:53:45PM +0800, Su Hui wrote:
> Clang static analyzer complains that value stored to 'rets' is never
> read. Remove some useless code, and let 'buf_len = -EOVERFLOW' to make
> sure we can return '-EOVERFLOW'.
> 
> mei_msg_hdr_init() return negative error code, rets should be
> 'PTR_ERR(mei_hdr)' rather than '-PTR_ERR(mei_hdr)'.
> 
> Fixes: 0cd7c01a60f8 ("mei: add support for mei extended header.")
> Fixes: 8c8d964ce90f ("mei: move hbuf_depth from the mei device to the hw modules")
> Signed-off-by: Su Hui <suhui@...china.com>
> ---
>  drivers/misc/mei/client.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
> index 9c8fc87938a7..00dac0a47da0 100644
> --- a/drivers/misc/mei/client.c
> +++ b/drivers/misc/mei/client.c
> @@ -2011,7 +2011,7 @@ ssize_t mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, unsigned long time
>  
>  	mei_hdr = mei_msg_hdr_init(cb);
>  	if (IS_ERR(mei_hdr)) {
> -		rets = -PTR_ERR(mei_hdr);
> +		rets = PTR_ERR(mei_hdr);

This looks like a bugfix, while the other changes here are just a normal
cleanup.  Can you please split this up into different patches?

thanks,

greg k-h