From: Dimitri Sivanich <sivanich@sgi.com>
Date: Fri, 6 May 2011 15:33:44 +0000 (-0500)
Subject: x86: poll waiting for I/OAT DMA channel status
X-Git-Tag: v3.0-rc1~27^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=19d78a61be6dd707dcec298c486303d4ba2c840a;p=pandora-kernel.git

x86: poll waiting for I/OAT DMA channel status

For certain system configurations a 5 usec udelay before checking I/OAT DMA
channel status is sometimes not sufficient, resulting in a false failure
status and unnecessary freeing of channel resources.  Conversely, for many
configurations 5 usec is longer than necessary.

Loop for up to 20 usec waiting for successful status before failing.

Signed-off-by: Dimitri Sivanich <sivanich@sgi.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---

Reading git-diff-tree failed