linux-kernel - [PATCH 4.2.y-ckt 105/305] net: mvneta: fix bit assignment for RX packet irq enable

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Message-Id: <1452902519-2754-106-git-send-email-kamal@canonical.com>
Date:	Fri, 15 Jan 2016 15:58:39 -0800
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Marcin Wojtas <mw@...ihalf.com>,
	"David S. Miller" <davem@...emloft.net>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 4.2.y-ckt 105/305] net: mvneta: fix bit assignment for RX packet irq enable

4.2.8-ckt2 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Marcin Wojtas <mw@...ihalf.com>

commit dc1aadf6f1e7609590fadf7a0252413732289b2e upstream.

A value originally defined in the driver was inappropriate. Even though
the ingress was somehow working, writing MVNETA_RXQ_INTR_ENABLE_ALL_MASK
to MVNETA_INTR_ENABLE didn't make any effect, because the bits [31:16]
are reserved and read-only.

This commit updates MVNETA_RXQ_INTR_ENABLE_ALL_MASK to be compliant with
the controller's documentation.

Signed-off-by: Marcin Wojtas <mw@...ihalf.com>

Fixes: c5aff18204da ("net: mvneta: driver for Marvell Armada 370/XP network
unit")
Signed-off-by: David S. Miller <davem@...emloft.net>

Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/net/ethernet/marvell/mvneta.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index 1e0d38b..82f63e9 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -156,7 +156,7 @@
 
 #define MVNETA_INTR_ENABLE                       0x25b8
 #define      MVNETA_TXQ_INTR_ENABLE_ALL_MASK     0x0000ff00
-#define      MVNETA_RXQ_INTR_ENABLE_ALL_MASK     0xff000000  // note: neta says it's 0x000000FF
+#define      MVNETA_RXQ_INTR_ENABLE_ALL_MASK     0x000000ff
 
 #define MVNETA_RXQ_CMD                           0x2680
 #define      MVNETA_RXQ_DISABLE_SHIFT            8
-- 
1.9.1