Subject: Re: [PATCH] char: ipmi: convert tasklets to use new tasklet_setup() API

From: Corey Minyard <[email-masked]>
Date: Mon, 17 Aug 2020 07:15:14 -0500

On Mon, Aug 17, 2020 at 02:45:57PM +0530, Allen Pais wrote:
> From: Allen Pais <[email-masked]>
> 
> 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 <[email-masked]>
> Signed-off-by: Allen Pais <[email-masked]>

This looks good to me.

Reviewed-by: Corey Minyard <[email-masked]>

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
>