linux-kernel - Re: [PATCH 2/2] i2c: opal: don't check number of messages in the driver

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Message-ID: <87muwoqbbw.fsf@concordia.ellerman.id.au>
Date:   Fri, 25 May 2018 20:27:47 +1000
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Wolfram Sang <wsa@...-dreams.de>, linux-i2c@...r.kernel.org
Cc:     Peter Rosin <peda@...ntia.se>, Wolfram Sang <wsa@...-dreams.de>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] i2c: opal: don't check number of messages in the driver

Wolfram Sang <wsa@...-dreams.de> writes:

> Since commit 1eace8344c02 ("i2c: add param sanity check to
> i2c_transfer()") and b7f625840267 ("i2c: add quirk checks to core"), the
> I2C core does this check now. We can remove it here.
>
> Signed-off-by: Wolfram Sang <wsa@...-dreams.de>
> ---
>
> Only build tested.

It will get boot tested by me once it's in linux-next, which hopefully
is sufficient for a patch like this.

cheers

> diff --git a/drivers/i2c/busses/i2c-opal.c b/drivers/i2c/busses/i2c-opal.c
> index 0aabb7eca0c5..dc2a23f4fb52 100644
> --- a/drivers/i2c/busses/i2c-opal.c
> +++ b/drivers/i2c/busses/i2c-opal.c
> @@ -94,8 +94,6 @@ static int i2c_opal_master_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
>  	 */
>  	memset(&req, 0, sizeof(req));
>  	switch(num) {
> -	case 0:
> -		return 0;
>  	case 1:
>  		req.type = (msgs[0].flags & I2C_M_RD) ?
>  			OPAL_I2C_RAW_READ : OPAL_I2C_RAW_WRITE;
> @@ -114,8 +112,6 @@ static int i2c_opal_master_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
>  		req.size = cpu_to_be32(msgs[1].len);
>  		req.buffer_ra = cpu_to_be64(__pa(msgs[1].buf));
>  		break;
> -	default:
> -		return -EOPNOTSUPP;
>  	}
>  
>  	rc = i2c_opal_send_request(opal_id, &req);
> -- 
> 2.11.0