linux-kernel - Re: [PATCH 2/2] net: qrtr: Fix FIXME related to qrtr_ns

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Date:   Sun, 1 Mar 2020 22:55:51 -0800
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 2/2] net: qrtr: Fix FIXME related to qrtr_ns_init()

On Sun 01 Mar 21:55 PST 2020, Manivannan Sadhasivam wrote:

> On Sun, Mar 01, 2020 at 07:25:27PM -0800, Bjorn Andersson wrote:
> > The 2 second delay before calling qrtr_ns_init() meant that the remote
> > processors would register as endpoints in qrtr and the say_hello() call
> > would therefor broadcast the outgoing HELLO to them. With the HELLO
> > handshake corrected this delay is no longer needed.
> > 
> > Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> > ---
> >  net/qrtr/ns.c   | 2 +-
> >  net/qrtr/qrtr.c | 6 +-----
> >  net/qrtr/qrtr.h | 2 +-
> >  3 files changed, 3 insertions(+), 7 deletions(-)
> > 
> > diff --git a/net/qrtr/ns.c b/net/qrtr/ns.c
> > index e3f11052b5f6..cfd4bd07a62b 100644
> > --- a/net/qrtr/ns.c
> > +++ b/net/qrtr/ns.c
> > @@ -693,7 +693,7 @@ static void qrtr_ns_data_ready(struct sock *sk)
> >  	queue_work(qrtr_ns.workqueue, &qrtr_ns.work);
> >  }
> >  
> > -void qrtr_ns_init(struct work_struct *work)
> > +void qrtr_ns_init(void)
> >  {
> >  	struct sockaddr_qrtr sq;
> >  	int ret;
> > diff --git a/net/qrtr/qrtr.c b/net/qrtr/qrtr.c
> > index 423310896285..313d3194018a 100644
> > --- a/net/qrtr/qrtr.c
> > +++ b/net/qrtr/qrtr.c
> > @@ -1263,11 +1263,7 @@ static int __init qrtr_proto_init(void)
> >  		return rc;
> >  	}
> >  
> > -	/* FIXME: Currently, this 2s delay is required to catch the NEW_SERVER
> > -	 * messages from routers. But the fix could be somewhere else.
> > -	 */
> > -	INIT_DELAYED_WORK(&qrtr_ns_work, qrtr_ns_init);
> > -	schedule_delayed_work(&qrtr_ns_work, msecs_to_jiffies(2000));
> > +	qrtr_ns_init();
> >  
> 
> You forgot to remove the below instances of delayed_work:
> 
> #include <linux/workqueue.h>
> struct delayed_work qrtr_ns_work;
> cancel_delayed_work_sync(&qrtr_ns_work);
> 

I sure did, thanks for noticing.

Regards,
Bjorn

> Other than that,
> 
> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> 
> Thanks,
> Mani
> 
> >  	return rc;
> >  }
> > diff --git a/net/qrtr/qrtr.h b/net/qrtr/qrtr.h
> > index 53a237a28971..dc2b67f17927 100644
> > --- a/net/qrtr/qrtr.h
> > +++ b/net/qrtr/qrtr.h
> > @@ -29,7 +29,7 @@ void qrtr_endpoint_unregister(struct qrtr_endpoint *ep);
> >  
> >  int qrtr_endpoint_post(struct qrtr_endpoint *ep, const void *data, size_t len);
> >  
> > -void qrtr_ns_init(struct work_struct *work);
> > +void qrtr_ns_init(void);
> >  
> >  void qrtr_ns_remove(void);
> >  
> > -- 
> > 2.24.0
> >