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From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>,
	Russell King <linux@armlinux.org.uk>,
	Adrian Salido <salidoa@google.com>,
	Nicolai Stange <nstange@suse.de>,
	Sasha Levin <Alexander.Levin@microsoft.com>,
	Todd Kjos <tkjos@android.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 2/4] ARM: amba: Fix race condition with driver_override
Date: Wed, 25 Apr 2018 19:53:06 +0200	[thread overview]
Message-ID: <CAMuHMdUVowxjG0Q=DGie_JjPqfz3UBDikvLnZ6_86jbcJMKqyQ@mail.gmail.com> (raw)
In-Reply-To: <20180425160645.GA16732@kroah.com>

Hi Greg,

On Wed, Apr 25, 2018 at 6:06 PM, Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
> On Tue, Apr 10, 2018 at 03:21:44PM +0200, Geert Uytterhoeven wrote:
>> The driver_override implementation is susceptible to a race condition
>> when different threads are reading vs storing a different driver
>> override.  Add locking to avoid this race condition.
>>
>> Cfr. commits 6265539776a0810b ("driver core: platform: fix race
>> condition with driver_override") and 9561475db680f714 ("PCI: Fix race
>> condition with driver_override").
>>
>> Fixes: 3cf385713460eb2b ("ARM: 8256/1: driver coamba: add device binding path 'driver_override'")
>> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
>> Reviewed-by: Todd Kjos <tkjos@google.com>
>> Cc: stable <stable@vger.kernel.org>

> As this should go to stable kernels, I've fixed it up to apply without
> patch 1 as that's not a real "fix" that anyone needs...
>
> Please try to remember to put fixes first, and then "trivial" things
> later on in a series.

I did it on purpose, as the fix is much more ugly without patch 1 applied.
Can't you just take patch 1, too? More consistency is always nice, even for
stable ;-)

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

  reply	other threads:[~2018-04-25 17:53 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-10 13:21 [PATCH v2 0/4] ARM: amba: driver_override improvements and fixes Geert Uytterhoeven
2018-04-10 13:21 ` [PATCH v2 1/4] ARM: amba: Make driver_override output consistent with other buses Geert Uytterhoeven
2018-04-25 15:53   ` Todd Kjos
2018-04-10 13:21 ` [PATCH v2 2/4] ARM: amba: Fix race condition with driver_override Geert Uytterhoeven
2018-04-25 15:56   ` Todd Kjos
2018-04-25 16:06   ` Greg Kroah-Hartman
2018-04-25 17:53     ` Geert Uytterhoeven [this message]
2018-04-26  7:04       ` Greg Kroah-Hartman
2018-04-26  7:40         ` Geert Uytterhoeven
2018-04-26  8:35           ` Greg Kroah-Hartman
2018-04-26  8:45             ` Geert Uytterhoeven
2018-05-09 10:39               ` Russell King - ARM Linux
2018-05-09 13:32                 ` Geert Uytterhoeven
2018-05-09 14:50                   ` Greg Kroah-Hartman
2018-04-10 13:21 ` [PATCH v2 3/4] ARM: amba: Don't read past the end of sysfs "driver_override" buffer Geert Uytterhoeven
2018-04-25 15:56   ` Todd Kjos
2018-04-10 13:21 ` [PATCH v2 4/4] ARM: amba: Fix wrong indentation in driver_override_store() Geert Uytterhoeven
2018-04-25 15:58   ` Todd Kjos
2018-04-10 22:19 ` [PATCH v2 0/4] ARM: amba: driver_override improvements and fixes Russell King - ARM Linux
2018-04-25 16:08   ` Greg Kroah-Hartman
2018-04-25 17:27   ` Geert Uytterhoeven

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