From: Magnus Damm <damm@opensource.se>
Date: Wed, 9 Nov 2011 23:44:10 +0000 (+0100)
Subject: PM / Clocks: Only disable enabled clocks in pm_clk_suspend()
X-Git-Tag: v3.2-rc3~28^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=24050956e029a9ecff096e1992869ada4492963c;p=pandora-kernel.git

PM / Clocks: Only disable enabled clocks in pm_clk_suspend()

Refrain from running clk_disable() on clocks that
have not been enabled. A typical case when this can
happen is during Suspend-to-RAM for devices that have
no driver associated with them. In such case the clock
may be in default ACQUIRED state.

Without this patch the sh7372 Mackerel board crashes
in __clk_disable() during Suspend-to-RAM with:
"Trying to disable clock 0xdeadbeef with 0 usecount"
This happens for the CEU device which is added during
boot. The test case has no CEU driver included in the
kernel configuration. Needed for v3.2-rc1.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
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