linux-kernel - Re: [PATCH] uart:8250: change lock order in serial8250_do

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Message-ID: <20200819015209.GA3302@jagdpanzerIV.localdomain>
Date:   Wed, 19 Aug 2020 10:52:09 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky@...il.com>
To:     Petr Mladek <pmladek@...e.com>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Tony Lindgren <tony@...mide.com>,
        Kurt Kanzenbach <kurt@...utronix.de>,
        Raul Rangel <rrangel@...gle.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        John Ogness <john.ogness@...utronix.de>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-serial@...r.kernel.org
Subject: Re: [PATCH] uart:8250: change lock order in serial8250_do_startup()

On (20/08/18 14:52), Petr Mladek wrote:
> > I guess we may add some tags here
> > 
> > Fixes: 768aec0b5bcc ("serial: 8250: fix shared interrupts issues with SMP and RT kernels")
> > Reported-by: Guenter Roeck <linux@...ck-us.net>
> > Reported-by: Raul Rangel <rrangel@...gle.com>
> > BugLink: https://bugs.chromium.org/p/chromium/issues/detail?id=1114800
> > Link: https://lore.kernel.org/lkml/CAHQZ30BnfX+gxjPm1DUd5psOTqbyDh4EJE=2=VAMW_VDafctkA@mail.gmail.com/T/#u
> 
> "Link:" tag should point to the mail that is applied using git am.
> I am not sure if there is a tag for related discussion in another
> mail threads.

Yes, that's a good point. I wonder if we can slightly change that
rule. That link points to a thread where we discussed various
approaches to the problem, what would work, what wouldn't and why;
there is some valuable feedback there. The "8250-fix-locks-v2.patch"
link, on the other hand, points to nothing valuable.

> Sounds reasonable to me.
> 
> Andy proposed many changes. Sergey, could you please send v2?

Sure, I think I sent v2 already.

	-ss