Re: [PATCH 1/2] net/mlx4_core: clean up cq_res_start_move_to()

[Jack Morgenstein <jackm@dev.mellanox.co.il>]

This time, replying to the list as well.

-Jack
P.S. sorry for the delay, I was swamped.

On Tue, 07 Jan 2014 14:01:18 +0100
Paul Bolle <pebolle@tiscali.nl> wrote:

> +	} else {
> +		/* state == RES_CQ_HW */
> +		if (r->com.state != RES_CQ_ALLOCATED)

if (state != RES_CQ_HW || r->com.state != RES_CQ_ALLOCATED)
to protect against any bad calls to this function
(although I know that currently there are none).

This also preserves the behavior of the switch statement.

>  			err = -EINVAL;
> -		}
> +		else
> +			err = 0;
> +	}
>  
> -		if (!err) {
> -			r->com.from_state = r->com.state;
> -			r->com.to_state = state;
> -			r->com.state = RES_CQ_BUSY;
> -			if (cq)
> -				*cq = r;
> -		}
> +	if (!err) {
> +		r->com.from_state = r->com.state;
> +		r->com.to_state = state;
> +		r->com.state = RES_CQ_BUSY;

Please keep the "if" here.  Protects against (future) bad calls.

> +		*cq = r;
>  	}