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

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Date:   Mon, 2 Mar 2020 11:25:10 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Bjorn Andersson <bjorn.andersson@...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, 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);

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
>