linux-kernel - Re: [PATCH 1/7] serial: sc16is7xx: fix snprintf format specifier in sc16is7xx_regmap

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Date:   Thu, 7 Dec 2023 11:05:44 -0500
From:   Hugo Villeneuve <hugo@...ovil.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     jirislaby@...nel.org, hvilleneuve@...onoff.com,
        linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
        stable@...r.kernel.org, Andy Shevchenko <andy.shevchenko@...il.com>
Subject: Re: [PATCH 1/7] serial: sc16is7xx: fix snprintf format specifier in
 sc16is7xx_regmap_name()

On Thu, 7 Dec 2023 10:45:48 +0900
Greg KH <gregkh@...uxfoundation.org> wrote:

> On Thu, Nov 30, 2023 at 02:10:43PM -0500, Hugo Villeneuve wrote:
> > From: Hugo Villeneuve <hvilleneuve@...onoff.com>
> > 
> > Change snprint format specifier from %d to %u since port_id is unsigned.
> > 
> > Fixes: 3837a0379533 ("serial: sc16is7xx: improve regmap debugfs by using one regmap per port")
> > Cc: stable@...r.kernel.org # 6.1.x: 3837a03 serial: sc16is7xx: improve regmap debugfs by using one regmap per port
> > Suggested-by: Andy Shevchenko <andy.shevchenko@...il.com>
> > Signed-off-by: Hugo Villeneuve <hvilleneuve@...onoff.com>
> > ---
> > I did not originally add a "Cc: stable" tag for commit 3837a0379533 ("serial: sc16is7xx: improve regmap debugfs by using one regmap per port")
> > as it was intended only to improve debugging using debugfs. But
> > since then, I have been able to confirm that it also fixes a long standing
> > bug in our system where the Tx interrupt are no longer enabled at some
> > point when transmitting large RS-485 paquets (> 64 bytes, which is the size
> > of the FIFO). I have been investigating why, but so far I haven't found the
> > exact cause, altough I suspect it has something to do with regmap caching.
> > Therefore, I have added it as a prerequisite for this patch so that it is
> > automatically added to the stable kernels.
> 
> As you are splitting fixes from non-fixes in this series, please resend
> this as 2 different series, one that I can apply now to my tty-linus
> branch to get merged for 6.7-final, and one that can go into tty-next
> for 6.8-rc1.  Mixing them up here just ensures that they all would get
> applied to tty-next.

Ok, makes sense. Will do after I fix the 0-day issue.

Thank you,
Hugo.