From: Marc Kleine-Budde <mkl@pengutronix.de>
Date: Sun, 24 Nov 2013 22:31:24 +0000 (+0100)
Subject: can: c_can: don't call pm_runtime_get_sync() from interrupt context
X-Git-Tag: v3.13-rc3~28^2~30^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e35d46adc49b469fd92bdb64fea8af93640e6651;p=pandora-kernel.git

can: c_can: don't call pm_runtime_get_sync() from interrupt context

The c_can driver contians a callpath (c_can_poll -> c_can_state_change ->
c_can_get_berr_counter) which may call pm_runtime_get_sync() from the IRQ
handler, which is not allowed and results in "BUG: scheduling while atomic".

This problem is fixed by introducing __c_can_get_berr_counter, which will not
call pm_runtime_get_sync().

Reported-by: Andrew Glen <AGlen@bepmarine.com>
Tested-by: Andrew Glen <AGlen@bepmarine.com>
Signed-off-by: Andrew Glen <AGlen@bepmarine.com>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---

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