linux-kernel - [PATCH 0/2] thermal: rcar: Fix crash and restore symmetry

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Date:	Wed,  4 Feb 2015 13:22:33 +0100
From:	Geert Uytterhoeven <geert+renesas@...der.be>
To:	Zhang Rui <rui.zhang@...el.com>,
	Eduardo Valentin <edubezval@...il.com>
Cc:	Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
	linux-pm@...r.kernel.org, linux-shvger.kernel.org@...san.of.borg,
	linux-kernel@...r.kernel.org,
	Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH 0/2] thermal: rcar: Fix crash and restore symmetry

	Hi,

This series fixes an intermittent crash (NULL pointer dereference) in
the rcar-thermal driver due to a race condition, and restores symmetry
in the error and remove paths.

So far I could trigger the race condition only on r8a73a4, and only
after a soft power-on reset using the rmobile-reset driver, which is
queued for v3.20. I could not trigger it on r8a7791.
I haven't tested this on any other r8a779x, or on r8a7779.
Hence I'm not sure it's worthwhile adding this to -stable yet.

This was tested on r8a73a4/ape6evm (fixes the crash) and
r8a7791/koelsch (crash not seen).

Thanks!

Geert Uytterhoeven (2):
  thermal: rcar: Fix race condition between init and interrupt
  thermal: rcar: Restore symmetry in error and remove paths

 drivers/thermal/rcar_thermal.c | 26 +++++++++++---------------
 1 file changed, 11 insertions(+), 15 deletions(-)

-- 
1.9.1

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-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
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