linux-kernel - [PATCH 1/4] of: dynamic: changeset prop-update revert fix

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Message-Id: <1462800045-10943-2-git-send-email-pantelis.antoniou@konsulko.com>
Date:	Mon,  9 May 2016 16:20:42 +0300
From:	Pantelis Antoniou <pantelis.antoniou@...sulko.com>
To:	Rob Herring <robherring2@...il.com>
Cc:	Frank Rowand <frowand.list@...il.com>,
	Matt Porter <mporter@...sulko.com>,
	Koen Kooi <koen@...inion.thruhere.net>,
	Guenter Roeck <linux@...ck-us.net>,
	Marek Vasut <marex@...x.de>, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Pantelis Antoniou <pantelis.antoniou@...sulko.com>,
	Pantelis Antoniou <panto@...oniou-consulting.com>
Subject: [PATCH 1/4] of: dynamic: changeset prop-update revert fix

When reverting an update property changeset entry that created a
property the reverse operation is a remove property and not an update.

Signed-off-by: Pantelis Antoniou <pantelis.antoniou@...sulko.com>
---
 drivers/of/dynamic.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
index c647bd1..4145b44 100644
--- a/drivers/of/dynamic.c
+++ b/drivers/of/dynamic.c
@@ -497,6 +497,11 @@ static void __of_changeset_entry_invert(struct of_changeset_entry *ce,
 	case OF_RECONFIG_UPDATE_PROPERTY:
 		rce->old_prop = ce->prop;
 		rce->prop = ce->old_prop;
+		/* update was used but original property did not exist */
+		if (!rce->prop) {
+			rce->action = OF_RECONFIG_REMOVE_PROPERTY;
+			rce->prop = ce->prop;
+		}
 		break;
 	}
 }
-- 
1.7.12