linux-kernel - [PATCH 3.12 107/146] bus: mvebu-mbus: allow several windows with the same target/attribute

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Date:	Mon,  9 Jun 2014 10:50:42 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Jason Cooper <jason@...edaemon.net>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 107/146] bus: mvebu-mbus: allow several windows with the same target/attribute

From: Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit b566e782be32145664d96ada3e389f17d32742e5 upstream.

Having multiple windows with the same target and attribute is actually
legal, and can be useful for PCIe windows, when PCIe BARs have a size
that isn't a power of two, and we therefore need to create several
MBus windows to cover the PCIe BAR for a given PCIe interface.

Fixes: fddddb52a6c4 ('bus: introduce an Marvell EBU MBus driver')
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Link: https://lkml.kernel.org/r/1397823593-1932-7-git-send-email-thomas.petazzoni@free-electrons.com
Tested-by: Neil Greatorex <neil@...boyfat.co.uk>
Signed-off-by: Jason Cooper <jason@...edaemon.net>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/bus/mvebu-mbus.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/bus/mvebu-mbus.c b/drivers/bus/mvebu-mbus.c
index 2394e9753ef5..b4bd72b6fdc8 100644
--- a/drivers/bus/mvebu-mbus.c
+++ b/drivers/bus/mvebu-mbus.c
@@ -222,12 +222,6 @@ static int mvebu_mbus_window_conflicts(struct mvebu_mbus_state *mbus,
 		 */
 		if ((u64)base < wend && end > wbase)
 			return 0;
-
-		/*
-		 * Check if target/attribute conflicts
-		 */
-		if (target == wtarget && attr == wattr)
-			return 0;
 	}
 
 	return 1;
-- 
1.9.3

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