From: Andy Walls <awalls@radix.net>
Date: Wed, 10 Feb 2010 18:34:46 +0000 (-0300)
Subject: V4L/DVB: ivtv: Fix ivtv_api_get_data() to avoid unneeded IO during IRQ handling
X-Git-Tag: v2.6.34-rc1~280^2~32
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=587808d5f59e842f9258a15e88ad530fcf6e6763;p=pandora-kernel.git

V4L/DVB: ivtv: Fix ivtv_api_get_data() to avoid unneeded IO during IRQ handling

ivtv_api_get_data() was performing more PCI MMIO than needed, resulting
often in it accounting for more than half the total time spent in
ivtv_irq_handler().  Now it only reads at most 7 of the 16 mailbox data words
over the PCI bus, and in some instances only 2 or 3 data words as needed.

Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---

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