linux-kernel - Re: [PATCH] staging: r8188eu: Fix some endian problems

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Date:   Fri, 20 Jan 2023 08:07:26 +0300
From:   Dan Carpenter <error27@...il.com>
To:     Larry Finger <Larry.Finger@...inger.net>
Cc:     gregkh@...uxfoundation.org, phil@...lpotter.co.uk,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        linux-wireless@...r.kernel.org,
        Gaurav Pathak <gauravpathak129@...il.com>
Subject: Re: [PATCH] staging: r8188eu: Fix some endian problems

On Thu, Jan 19, 2023 at 01:12:19PM -0600, Larry Finger wrote:
> Sparse lists the following warnings:
> 
>   CHECK   drivers/staging/r8188eu/core/rtw_mlme.c
> drivers/staging/r8188eu/core/rtw_mlme.c:1197:49: warning: incorrect type in
> 					 argument 2 (different base types)
> drivers/staging/r8188eu/core/rtw_mlme.c:1197:49:    expected restricted
> 					 __le16 [usertype] mstatus_rpt
> drivers/staging/r8188eu/core/rtw_mlme.c:1197:49:    got unsigned short
> 					 [assigned] [usertype] media_status_rpt
> drivers/staging/r8188eu/core/rtw_mlme.c:1275:57: warning: incorrect type in
> 					 argument 2 (different base types)
> drivers/staging/r8188eu/core/rtw_mlme.c:1275:57:    expected restricted
> 					 __le16 [usertype] mstatus_rpt
> drivers/staging/r8188eu/core/rtw_mlme.c:1275:57:    got unsigned short
> 					 [assigned] [usertype] media_status
>   CHECK   drivers/staging/r8188eu/core/rtw_mlme_ext.c
> drivers/staging/r8188eu/core/rtw_mlme_ext.c:6842:58: warning: incorrect type
> 					 in argument 2 (different base types)
> drivers/staging/r8188eu/core/rtw_mlme_ext.c:6842:58:    expected restricted
> 					 __le16 [usertype] mstatus_rpt
> drivers/staging/r8188eu/core/rtw_mlme_ext.c:6842:58:    got unsigned short
> 					 [assigned] [usertype] media_status
> 
> The second argument of rtl8188e_set_FwMediaStatus_cmd() needs to be in CPU
> order, not little-endian; however, when it uses that value to call
> FillH2CCmd_88E() the parameter must be in little-endian order as that
> value will be sent to the firmware. Note that the conversion from LE to CPU
> order was le16_to_cpu() rather than the correct cpu_to_le16.
> 
> The definition of FillH2CCmd_88E() is revised, and the proper conversion
> routine is used.
> 
> Note that the original code performed one byte swap on the secong argument
> of FillH2CCmd_88E(), and got the correct answer even though the semantics
> were very wrong.
> 
> Signed-off-by: Larry Finger <Larry.Finger@...inger.net>
> Reportewd-by: Gaurav Pathak <gauravpathak129@...il.com>
         ^
Extra 'w'.

Reviewed-by: Dan Carpenter <error27@...il.com>

regards,
dan carpenter