linux-kernel - [PATCH 3.19.y-ckt 025/251] bus: arm-ccn: Fix node->XP config conversion

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Message-Id: <1437008972-9140-26-git-send-email-kamal@canonical.com>
Date:	Wed, 15 Jul 2015 18:05:46 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Pawel Moll <pawel.moll@....com>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.19.y-ckt 025/251] bus: arm-ccn: Fix node->XP config conversion

3.19.8-ckt4 -stable review patch.  If anyone has any objections, please let me know.

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

From: Pawel Moll <pawel.moll@....com>

commit a18f8e97fe69195823d7fb5c68a8d6565f39db4b upstream.

Events defined as watchpoints on nodes must have their config values
converted so that they apply to the respective node's XP. The
function setting new values was using wrong mask for the "port" field,
resulting in corrupted value. Fixed now.

Signed-off-by: Pawel Moll <pawel.moll@....com>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/bus/arm-ccn.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/bus/arm-ccn.c b/drivers/bus/arm-ccn.c
index aaa0f2a..60397ec 100644
--- a/drivers/bus/arm-ccn.c
+++ b/drivers/bus/arm-ccn.c
@@ -212,7 +212,7 @@ static int arm_ccn_node_to_xp_port(int node)
 
 static void arm_ccn_pmu_config_set(u64 *config, u32 node_xp, u32 type, u32 port)
 {
-	*config &= ~((0xff << 0) | (0xff << 8) | (0xff << 24));
+	*config &= ~((0xff << 0) | (0xff << 8) | (0x3 << 24));
 	*config |= (node_xp << 0) | (type << 8) | (port << 24);
 }
 
-- 
1.9.1

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