From: Steve Hodgson <shodgson@solarflare.com>
Date: Wed, 28 Apr 2010 09:28:27 +0000 (+0000)
Subject: sfc: Extend the legacy interrupt workarounds
X-Git-Tag: v2.6.35-rc1~473^2~325
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=41b7e4c3268d9d2056b9c94cceb386649f7b185b;p=pandora-kernel.git

sfc: Extend the legacy interrupt workarounds

Siena has two problems with legacy interrupts:
  1. There is no synchronisation between the ISR read completion,
     and the interrupt deassert message.
  2. A downstream read at the "wrong" moment can return 0, and
     suppress generating the next interrupt.

Falcon should suffer from both of these, and it appears it does.
Enable EFX_WORKAROUND_15783 on Falcon as well.

Also, when we see queues == 0, ensure we always schedule or rearm
every event queue.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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