This is a note to let you know that I've just added the patch titled
[PATCH 18/28] net/ethernet: ks8851_mll fix rx frame buffer overflow
to the 3.3-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-ethernet-ks8851_mll-fix-rx-frame-buffer-overflow.patch
and it can be found in the queue-3.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 9d0bc6304eddb1895286ea19a18ad29f82d05be1 Mon Sep 17 00:00:00 2001
From: Davide Ciminaghi <[email protected]>
Date: Fri, 13 Apr 2012 04:48:25 +0000
Subject: [PATCH 18/28] net/ethernet: ks8851_mll fix rx frame buffer overflow
From: Davide Ciminaghi <[email protected]>
[ Upstream commit 8a9a0ea6032186e3030419262678d652b88bf6a8 ]
At the beginning of ks_rcv(), a for loop retrieves the
header information relevant to all the frames stored
in the mac's internal buffers. The number of pending
frames is stored as an 8 bits field in KS_RXFCTR.
If interrupts are disabled long enough to allow for more than
32 frames to accumulate in the MAC's internal buffers, a buffer
overflow occurs.
This patch fixes the problem by making the
driver's frame_head_info buffer big enough.
Well actually, since the chip appears to have 12K of
internal rx buffers and the shortest ethernet frame should
be 64 bytes long, maybe the limit could be set to
12*1024/64 = 192 frames, but 255 should be safer.
Signed-off-by: Davide Ciminaghi <[email protected]>
Signed-off-by: Raffaele Recalcati <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/net/ethernet/micrel/ks8851_mll.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/ethernet/micrel/ks8851_mll.c
+++ b/drivers/net/ethernet/micrel/ks8851_mll.c
@@ -40,7 +40,7 @@
#define DRV_NAME "ks8851_mll"
static u8 KS_DEFAULT_MAC_ADDRESS[] = { 0x00, 0x10, 0xA1, 0x86, 0x95, 0x11 };
-#define MAX_RECV_FRAMES 32
+#define MAX_RECV_FRAMES 255
#define MAX_BUF_SIZE 2048
#define TX_BUF_SIZE 2000
#define RX_BUF_SIZE 2000
Patches currently in stable-queue which might be from [email protected] are
queue-3.3/net-ethernet-ks8851_mll-fix-rx-frame-buffer-overflow.patch
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