Re: [PATCH] tty: n_gsm: delete SABM command frame as requester

[Jiri Slaby]

On 01. 07. 21, 8:13, Jiri Slaby wrote:
> On 01. 07. 21, 4:54, Zhenguo Zhao wrote:
> > From: Zhenguo Zhao <Zhenguo.Zhao1@xxxxxxxxxx>
> >
> > as initiator,it need to send SABM conmmand ,as requester,there is
> > no need to send the SABM control frame,it will cause redundant data.
>
> Hi,
>
> is there any document you can refer to? I am still confused so I don't 
> understand why this didn't matter until now. Maybe you only need to 
> explain better the whole point behind the introduced initiator/requester 
> functionality.

Having written that, I am missing the WHY part. E.g. why it causes 
redundant data.

> In any way, could you use spell checker on the commit log (like 
> "conmmand")?
>
> > Signed-off-by: Zhenguo Zhao <Zhenguo.Zhao1@xxxxxxxxxx>
> > ---
> >   drivers/tty/n_gsm.c | 5 +++--
> >   1 file changed, 3 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
> > index 5fea02c..e66418b 100644
> > --- a/drivers/tty/n_gsm.c
> > +++ b/drivers/tty/n_gsm.c
> > @@ -3005,8 +3005,9 @@ static int gsmtty_open(struct tty_struct *tty, 
> > struct file *filp)
> >       /* We could in theory open and close before we wait - eg if we get
> >          a DM straight back. This is ok as that will have caused a 
> > hangup */
> >       tty_port_set_initialized(port, 1);
> > -    /* Start sending off SABM messages */
> > -    gsm_dlci_begin_open(dlci);
> > +    /* Start sending off SABM messages for initiator */
> > +    if (gsm->initiator)
> > +        gsm_dlci_begin_open(dlci);
> >       /* And wait for virtual carrier */
> >       return tty_port_block_til_ready(port, tty, filp);
> >   }
>
> thanks,


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