Thread (86 messages) 86 messages, 5 authors, 2012-08-05

Re: [ 28/73] ARM: OMAP2+: OPP: Fix to ensure check of right oppdef after bad one

From: Herton Ronaldo Krzesinski <hidden>
Date: 2012-08-01 01:56:31

On Tue, Jul 31, 2012 at 05:43:38AM +0100, Ben Hutchings wrote:
3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Nishanth Menon <nm@ti.com>

commit b110547e586eb5825bc1d04aa9147bff83b57672 upstream.
This change is uneeded in 3.2, but doesn't do any harm either... it just
seems to fix the code because of the continue added in 9fa2df6b (ARM:
OMAP2+: OPP: allow OPP enumeration to continue if device is not present),
change which 3.2 doesn't have. A noop for 3.2 anyway, so either way it's
fine, applying or not, just commenting on it.
quoted hunk ↗ jump to hunk
Commit 9fa2df6b90786301b175e264f5fa9846aba81a65
(ARM: OMAP2+: OPP: allow OPP enumeration to continue if device is not present)
makes the logic:
for (i = 0; i < opp_def_size; i++) {
	<snip>
	if (!oh || !oh->od) {
		<snip>
		continue;
	}
<snip>
opp_def++;
}

In short, the moment we hit a "Bad OPP", we end up looping the list
comparing against the bad opp definition pointer for the rest of the
iteration count. Instead, increment opp_def in the for loop itself
and allow continue to be used in code without much thought so that
we check the next set of OPP definition pointers :)

Cc: Steve Sakoman <redacted>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Kevin Hilman <redacted>
Signed-off-by: Ben Hutchings <redacted>
---
 arch/arm/mach-omap2/opp.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/arm/mach-omap2/opp.c b/arch/arm/mach-omap2/opp.c
index de6d464..d8f6dbf 100644
--- a/arch/arm/mach-omap2/opp.c
+++ b/arch/arm/mach-omap2/opp.c
@@ -53,7 +53,7 @@ int __init omap_init_opp_table(struct omap_opp_def *opp_def,
 	omap_table_init = 1;
 
 	/* Lets now register with OPP library */
-	for (i = 0; i < opp_def_size; i++) {
+	for (i = 0; i < opp_def_size; i++, opp_def++) {
 		struct omap_hwmod *oh;
 		struct device *dev;
 
@@ -86,7 +86,6 @@ int __init omap_init_opp_table(struct omap_opp_def *opp_def,
 					__func__, opp_def->freq,
 					opp_def->hwmod_name, i, r);
 		}
-		opp_def++;
 	}
 
 	return 0;


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[]'s
Herton
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