linux-kernel - Re: [PATCHv2] usb: typec: tps6598x: handle block writes separately with plain-I2C adapters

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Date:   Wed, 20 Feb 2019 16:02:27 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Nikolaus Voss <nv@...n.de>
Cc:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Guenter Roeck <linux@...ck-us.net>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, nikolaus.voss@...wensteinmedical.de
Subject: Re: [PATCHv2] usb: typec: tps6598x: handle block writes separately
 with plain-I2C adapters

On Wed, Feb 20, 2019 at 01:57:30PM +0100, Nikolaus Voss wrote:
> Commit 1a2f474d328f handles block _reads_ separately with plain-I2C
> adapters, but the problem described with regmap-i2c not handling
> SMBus block transfers (i.e. read and writes) correctly also exists
> with writes.
> 
> As workaround, this patch adds a block write function the same way
> 1a2f474d328f adds a block read function.
> 
> Fixes: 1a2f474d328f ("usb: typec: tps6598x: handle block reads separately with plain-I2C adapters")
> Fixes: 0a4c005bd171 ("usb: typec: driver for TI TPS6598x USB Power Delivery controllers")
> Signed-off-by: Nikolaus Voss <nikolaus.voss@...wensteinmedical.de>
> ---

As was pointed out, you have to have a From: that matches a
signed-off-by somewhere here.  If your company email systems is horrid
and can not handle patches, then put the correct from: line as the first
line of the commit message as the documentation says and all will be
good.



> v2: fix tps6598x_exec_cmd also
> ---
>  drivers/usb/typec/tps6598x.c | 26 ++++++++++++++++++++------
>  1 file changed, 20 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/usb/typec/tps6598x.c b/drivers/usb/typec/tps6598x.c
> index c84c8c189e90..c54b73fb2a2f 100644
> --- a/drivers/usb/typec/tps6598x.c
> +++ b/drivers/usb/typec/tps6598x.c
> @@ -110,6 +110,20 @@ tps6598x_block_read(struct tps6598x *tps, u8 reg, void *val, size_t len)
>  	return 0;
>  }
>  
> +static int tps6598x_block_write(struct tps6598x *tps, u8 reg,
> +				void *val, size_t len)
> +{
> +	u8 data[len + 1];

I thought the build system now warned when you did this :(

thanks,

greg k-h