From: Wolfgang Grandegger <wg@grandegger.com>
Date: Mon, 13 Jun 2016 13:44:19 +0000 (+0200)
Subject: can: at91_can: RX queue could get stuck at high bus load
X-Git-Tag: v3.2.82~35
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1dcff8d3b5b2eb82f62824ea2197ccc3fcaee8b3;p=pandora-kernel.git

can: at91_can: RX queue could get stuck at high bus load

commit 43200a4480cbbe660309621817f54cbb93907108 upstream.

At high bus load it could happen that "at91_poll()" enters with all RX
message boxes filled up. If then at the end the "quota" is exceeded as
well, "rx_next" will not be reset to the first RX mailbox and hence the
interrupts remain disabled.

Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Tested-by: Amr Bekhit <amrbekhit@gmail.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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