From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 11 Apr 2014 08:13:10 +0000 (+0000)
Subject: can: c_can: Fix startup logic
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~214^2~39^2~24
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bed11db3d4095e5f818f5e8bf7f43ef2beb36d4e;p=pandora-kernel.git

can: c_can: Fix startup logic

c_can_start() enables interrupts way too early. The first enabling
happens when setting the control mode in c_can_chip_config() and then
again at the end of the function.

But that happens before napi_enable() and that means that an interrupt
which comes in will disable interrupts again and call napi_schedule,
which ignores the request and the later napi_enable() is not making
thinks work either. So the interface is up with all device interrupts
disabled.

Move the device interrupt after napi_enable() and add it to the other
callsites of c_can_start() in c_can_set_mode() and c_can_power_up()

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---

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