netdev - Re: [PATCH] char: ipmi: convert tasklets to use new tasklet

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Date:   Mon, 17 Aug 2020 07:15:14 -0500
From:   Corey Minyard <minyard@....org>
To:     Allen Pais <allen.cryptic@...il.com>
Cc:     jdike@...toit.com, richard@....at, anton.ivanov@...bridgegreys.com,
        3chas3@...il.com, axboe@...nel.dk, stefanr@...6.in-berlin.de,
        airlied@...ux.ie, daniel@...ll.ch, sre@...nel.org,
        James.Bottomley@...senPartnership.com, kys@...rosoft.com,
        deller@....de, dmitry.torokhov@...il.com, jassisinghbrar@...il.com,
        shawnguo@...nel.org, s.hauer@...gutronix.de,
        maximlevitsky@...il.com, oakad@...oo.com, ulf.hansson@...aro.org,
        mporter@...nel.crashing.org, alex.bou9@...il.com,
        broonie@...nel.org, martyn@...chs.me.uk, manohar.vanga@...il.com,
        mitch@...oth.com, davem@...emloft.net, kuba@...nel.org,
        keescook@...omium.org, linux-um@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        linux-atm-general@...ts.sourceforge.net, netdev@...r.kernel.org,
        linux-block@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        openipmi-developer@...ts.sourceforge.net,
        linux1394-devel@...ts.sourceforge.net,
        intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-hyperv@...r.kernel.org, linux-parisc@...r.kernel.org,
        linux-input@...r.kernel.org, linux-mmc@...r.kernel.org,
        linux-ntb@...glegroups.com, linux-s390@...r.kernel.org,
        linux-spi@...r.kernel.org, devel@...verdev.osuosl.org,
        Allen Pais <allen.lkml@...il.com>,
        Romain Perier <romain.perier@...il.com>
Subject: Re: [PATCH] char: ipmi: convert tasklets to use new tasklet_setup()
 API

On Mon, Aug 17, 2020 at 02:45:57PM +0530, Allen Pais wrote:
> From: Allen Pais <allen.lkml@...il.com>
> 
> In preparation for unconditionally passing the
> struct tasklet_struct pointer to all tasklet
> callbacks, switch to using the new tasklet_setup()
> and from_tasklet() to pass the tasklet pointer explicitly.
> 
> Signed-off-by: Romain Perier <romain.perier@...il.com>
> Signed-off-by: Allen Pais <allen.lkml@...il.com>

This looks good to me.

Reviewed-by: Corey Minyard <cminyard@...sta.com>

Are you planning to push this, or do you want me to take it?  If you
want me to take it, what is the urgency?

-corey

> ---
>  drivers/char/ipmi/ipmi_msghandler.c | 13 ++++++-------
>  1 file changed, 6 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c
> index 737c0b6b24ea..e1814b6a1225 100644
> --- a/drivers/char/ipmi/ipmi_msghandler.c
> +++ b/drivers/char/ipmi/ipmi_msghandler.c
> @@ -39,7 +39,7 @@
>  
>  static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void);
>  static int ipmi_init_msghandler(void);
> -static void smi_recv_tasklet(unsigned long);
> +static void smi_recv_tasklet(struct tasklet_struct *t);
>  static void handle_new_recv_msgs(struct ipmi_smi *intf);
>  static void need_waiter(struct ipmi_smi *intf);
>  static int handle_one_recv_msg(struct ipmi_smi *intf,
> @@ -3430,9 +3430,8 @@ int ipmi_add_smi(struct module         *owner,
>  	intf->curr_seq = 0;
>  	spin_lock_init(&intf->waiting_rcv_msgs_lock);
>  	INIT_LIST_HEAD(&intf->waiting_rcv_msgs);
> -	tasklet_init(&intf->recv_tasklet,
> -		     smi_recv_tasklet,
> -		     (unsigned long) intf);
> +	tasklet_setup(&intf->recv_tasklet,
> +		     smi_recv_tasklet);
>  	atomic_set(&intf->watchdog_pretimeouts_to_deliver, 0);
>  	spin_lock_init(&intf->xmit_msgs_lock);
>  	INIT_LIST_HEAD(&intf->xmit_msgs);
> @@ -4467,10 +4466,10 @@ static void handle_new_recv_msgs(struct ipmi_smi *intf)
>  	}
>  }
>  
> -static void smi_recv_tasklet(unsigned long val)
> +static void smi_recv_tasklet(struct tasklet_struct *t)
>  {
>  	unsigned long flags = 0; /* keep us warning-free. */
> -	struct ipmi_smi *intf = (struct ipmi_smi *) val;
> +	struct ipmi_smi *intf = from_tasklet(intf, t, recv_tasklet);
>  	int run_to_completion = intf->run_to_completion;
>  	struct ipmi_smi_msg *newmsg = NULL;
>  
> @@ -4542,7 +4541,7 @@ void ipmi_smi_msg_received(struct ipmi_smi *intf,
>  		spin_unlock_irqrestore(&intf->xmit_msgs_lock, flags);
>  
>  	if (run_to_completion)
> -		smi_recv_tasklet((unsigned long) intf);
> +		smi_recv_tasklet(&intf->recv_tasklet);
>  	else
>  		tasklet_schedule(&intf->recv_tasklet);
>  }
> -- 
> 2.17.1
>