Re: [PATCH] [PATCH v3] USB: serial: option: add missing RSVD(5) flag for Rolling RW135R-GL

[Johan Hovold <johan@kernel.org>]

On Wed, May 13, 2026 at 03:20:34PM +0800, zwq2226404116@163.com wrote:
> From: Wanquan Zhong <wanquan.zhong@fibocom.com>
> 
> The RW135R-GL MBIM interface entry added in commit before was missing
> the .driver_info = RSVD(5) flag.
> 
> Without this flag, the option driver binds to the MBIM interface
> and conflicts with the cdc_mbim driver, causing AT/MBIM communication
> failures after switching to 43 mode. This matches the handling of
> other Rolling Wireless MBIM devices.

This description still makes no sense as I pointed out before.

> - VID:PID 33f8:1003, RW135R-GL for laptop debug M.2 cards(with MBIM
> interface for /Linux/Chrome OS)
> 0x1003: mbim, diag, AT, ADB, pipe
> Here are the outputs of usb-devices:
> T:  Bus=03 Lev=01 Prnt=01 Port=04 Cnt=02 Dev#=  7 Spd=480  MxCh= 0
> D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
> P:  Vendor=33f8 ProdID=1003 Rev= 5.15
> S:  Manufacturer=Rolling Wireless S.a.r.l.
> S:  Product=Rolling RW135R-GL Module
> S:  SerialNumber=12345678
> C:* #Ifs= 6 Cfg#= 1 Atr=a0 MxPwr=500mA
> A:  FirstIf#= 0 IfCount= 2 Cls=02(comm.) Sub=0e Prot=00
> I:* If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=0e Prot=00 Driver=cdc_mbim
> E:  Ad=82(I) Atr=03(Int.) MxPS=  64 Ivl=32ms
> I:  If#= 1 Alt= 0 #EPs= 0 Cls=0a(data ) Sub=00 Prot=02 Driver=cdc_mbim
> I:* If#= 1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=02 Driver=cdc_mbim
> E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> I:* If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
> E:  Ad=83(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms:
> I:* If#= 3 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=30 Driver=option
> E:  Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E:  Ad=84(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> I:* If#= 4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=40 Driver=option
> E:  Ad=86(I) Atr=03(Int.) MxPS=  10 Ivl=32ms
> E:  Ad=85(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E:  Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> I:* If#= 5 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=42 Prot=01 Driver=(none)
> E:  Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E:  Ad=87(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms

> Fixes: 01e8d0f74222 ("usb: serial: add support for Rolling Wireless RW135R-GL (33f8:1003)")

The description in the Fixes tag still does not match the git log (I
edited it when applying).

> Signed-off-by: Wanquan Zhong <wanquan.zhong@fibocom.com>
> ---

Please also include a short changelog here below the --- line when
revising patches.

Johan