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

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Message-ID: <20190221095236.GA26960@kroah.com>
Date:   Thu, 21 Feb 2019 10:52:36 +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
Subject: Re: [PATCHv2] usb: typec: tps6598x: handle block writes separately
 with plain-I2C adapters

On Thu, Feb 21, 2019 at 09:37:33AM +0100, Nikolaus Voss wrote:
> Hi Greg,
> 
> On Wed, 20 Feb 2019, Greg Kroah-Hartman wrote:
> > On Wed, Feb 20, 2019 at 04:22:00PM +0100, Nikolaus Voss wrote:
> > > > > 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 :(
> > > 
> > > I must admit I'm developing on 4.19 stable series, so no warnings...
> > 
> > Ick, no, you are 6 months behind where the rest of us are :(
> > 
> > Always, at the very least, work off of Linus's tree.  For best results,
> > work off of linux-next.
> 
> we are a medical device manufacturer and our prototypes run stable kernels
> because our main development goal is the patient therapy.

That's great, and fine, but testing on newer kernels is always a good
idea, that way you are not over a year behind when you have to move to
the next LTS release :)

thanks,

greg k-h