From: Magnus Damm <damm@opensource.se>
Date: Mon, 13 Jun 2011 04:42:15 +0000 (+0000)
Subject: drivers: sh: resume enabled clocks fix
X-Git-Tag: 2.1b_release~3659^2~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=583af252ab07cd1e8721878463da5b7016c18fdc;p=platform%2Fkernel%2Fkernel-mfld-blackbay.git

drivers: sh: resume enabled clocks fix

Extend the SH / SH-Mobile ARM clock framework to only
resume clocks that have been enabled.

Without this fix divide-by-zero is triggering on sh7372
FSIDIV during system wide resume of Suspend-to-RAM.

Signed-off-by: Magnus Damm <damm@opensource.se>
Reviewed-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---

diff --git a/drivers/sh/clk/core.c b/drivers/sh/clk/core.c
index 4f64183..7e9c399 100644
--- a/drivers/sh/clk/core.c
+++ b/drivers/sh/clk/core.c
@@ -635,7 +635,7 @@ static void clks_core_resume(void)
 	struct clk *clkp;
 
 	list_for_each_entry(clkp, &clock_list, node) {
-		if (likely(clkp->ops)) {
+		if (likely(clkp->usecount && clkp->ops)) {
 			unsigned long rate = clkp->rate;
 
 			if (likely(clkp->ops->set_parent))