linux-kernel - [72/98] r8169: fix broken register writes

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Message-Id: <20100510223540.881268212@kvm.kroah.org>
Date:	Mon, 10 May 2010 15:35:24 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Francois Romieu <romieu@...zoreil.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: [72/98] r8169: fix broken register writes

2.6.32-stable review patch.  If anyone has any objections, please let us know.

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

From: Francois Romieu <romieu@...zoreil.com>

commit 78f1cd02457252e1ffbc6caa44a17424a45286b8 upstream.

This is quite similar to b39fe41f481d20c201012e4483e76c203802dda7
though said registers are not even documented as 64-bit registers
- as opposed to the initial TxDescStartAddress ones - but as single
bytes which must be combined into 32 bits at the MMIO read/write
level before being merged into a 64 bit logical entity.

Credits go to Ben Hutchings <ben@...adent.org.uk> for the MAR
registers (aka "multicast is broken for ages on ARM) and to
Timo Teräs <timo.teras@....fi> for the MAC registers.

Signed-off-by: Francois Romieu <romieu@...zoreil.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/net/r8169.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/net/r8169.c
+++ b/drivers/net/r8169.c
@@ -2832,8 +2832,8 @@ static void rtl_rar_set(struct rtl8169_p
 	spin_lock_irq(&tp->lock);
 
 	RTL_W8(Cfg9346, Cfg9346_Unlock);
-	RTL_W32(MAC0, low);
 	RTL_W32(MAC4, high);
+	RTL_W32(MAC0, low);
 	RTL_W8(Cfg9346, Cfg9346_Lock);
 
 	spin_unlock_irq(&tp->lock);
@@ -4814,8 +4814,8 @@ static void rtl_set_rx_mode(struct net_d
 		mc_filter[1] = swab32(data);
 	}
 
-	RTL_W32(MAR0 + 0, mc_filter[0]);
 	RTL_W32(MAR0 + 4, mc_filter[1]);
+	RTL_W32(MAR0 + 0, mc_filter[0]);
 
 	RTL_W32(RxConfig, tmp);
 


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