linux-kernel - Re: [PATCH] misc: eeprom/idt_89hpesx: Convert data structures to LE explicitly

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Date: Tue, 30 Jan 2024 06:04:17 -0800
From: Greg KH <gregkh@...uxfoundation.org>
To: Dawei Li <dawei.li@...ngroup.cn>
Cc: arnd@...db.de, fancer.lancer@...il.com, lkp@...el.com,
	linux-kernel@...r.kernel.org, set_pte_at@...look.com,
	stable@...r.kernel.org
Subject: Re: [PATCH] misc: eeprom/idt_89hpesx: Convert data structures to LE
 explicitly

On Tue, Jan 30, 2024 at 12:06:32PM +0800, Dawei Li wrote:
> For data structures needs cpu_to_le* conversion, its prototype needs to
> be declared with __le* explicitly.
> 
> Fixes: cfad6425382e ("eeprom: Add IDT 89HPESx EEPROM/CSR driver")
> Reported-by: kernel test robot <lkp@...el.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202401261250.b07Yt30Z-lkp@intel.com/
> Signed-off-by: Dawei Li <dawei.li@...ngroup.cn>
> Cc: <stable@...r.kernel.org>
> ---
>  drivers/misc/eeprom/idt_89hpesx.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/misc/eeprom/idt_89hpesx.c b/drivers/misc/eeprom/idt_89hpesx.c
> index d807d08e2614..327afb866b21 100644
> --- a/drivers/misc/eeprom/idt_89hpesx.c
> +++ b/drivers/misc/eeprom/idt_89hpesx.c
> @@ -129,7 +129,7 @@ struct idt_smb_seq {
>  struct idt_eeprom_seq {
>  	u8 cmd;
>  	u8 eeaddr;
> -	u16 memaddr;
> +	__le16 memaddr;
>  	u8 data;
>  } __packed;
>  
> @@ -141,8 +141,8 @@ struct idt_eeprom_seq {
>   */
>  struct idt_csr_seq {
>  	u8 cmd;
> -	u16 csraddr;
> -	u32 data;
> +	__le16 csraddr;
> +	__le32 data;
>  } __packed;
>  
>  /*

Declaring them this way is nice, but this doesn't actually "fix"
anything at all as no code is actually changed.

So how is ths a bugfix?  How does this patch do anything?

confused,

greg k-h