From: Tomi Valkeinen <tomi.valkeinen@ti.com>
Date: Wed, 23 May 2012 14:02:26 +0000 (+0300)
Subject: OMAPDSS: fix bogus WARN_ON in dss_runtime_put()
X-Git-Tag: v3.5-rc3~26^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5025ce070e2dff80bcf015a34a82edcf78229287;p=pandora-kernel.git

OMAPDSS: fix bogus WARN_ON in dss_runtime_put()

pm_runtime_put_sync() in dss_runtime_put() returns -EBUSY when any child
of dss is still enabled. This happens, for example, when a display
output is enabled and one dumps the clocks via debugfs. This causes
dss_runtime_get & put to be called.

While I couldn't find anything about this in the documentation and it
wasn't immediately clear from runtime_pm code, it looks to me that
pm_runtime_put_sync() returns -EBUSY to inform that things went fine,
but the device could not be turned off as there are still child devices
that are enabled. This is not a problem.

This patch skips the WARN_ON if pm_runtime_put_sync() returns -EBUSY.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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