This is a note to let you know that I've just added the patch titled
tg3: Fix data corruption on 5725 with TSO
to the 3.4-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:
tg3-fix-data-corruption-on-5725-with-tso.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 0f0d15100a8ac875bdd408324c473e16d73d3557 Mon Sep 17 00:00:00 2001
From: Michael Chan <mchan@xxxxxxxxxxxx>
Date: Mon, 13 May 2013 11:04:16 +0000
Subject: tg3: Fix data corruption on 5725 with TSO
From: Michael Chan <mchan@xxxxxxxxxxxx>
commit 0f0d15100a8ac875bdd408324c473e16d73d3557 upstream.
The 5725 family of devices (asic rev 5762), corrupts TSO packets where
the buffer is within MSS bytes of a 4G boundary (4G, 8G etc.). Detect
this condition and trigger the workaround path.
Signed-off-by: Michael Chan <mchan@xxxxxxxxxxxx>
Signed-off-by: Nithin Nayak Sujir <nsujir@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/broadcom/tg3.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -6622,6 +6622,20 @@ static inline int tg3_4g_overflow_test(d
return (base > 0xffffdcc0) && (base + len + 8 < base);
}
+/* Test for TSO DMA buffers that cross into regions which are within MSS bytes
+ * of any 4GB boundaries: 4G, 8G, etc
+ */
+static inline int tg3_4g_tso_overflow_test(struct tg3 *tp, dma_addr_t mapping,
+ u32 len, u32 mss)
+{
+ if (tg3_asic_rev(tp) == ASIC_REV_5762 && mss) {
+ u32 base = (u32) mapping & 0xffffffff;
+
+ return ((base + len + (mss & 0x3fff)) < base);
+ }
+ return 0;
+}
+
/* Test for DMA addresses > 40-bit */
static inline int tg3_40bit_overflow_test(struct tg3 *tp, dma_addr_t mapping,
int len)
@@ -6658,6 +6672,9 @@ static bool tg3_tx_frag_set(struct tg3_n
if (tg3_4g_overflow_test(map, len))
hwbug = true;
+ if (tg3_4g_tso_overflow_test(tp, map, len, mss))
+ hwbug = true;
+
if (tg3_40bit_overflow_test(tp, map, len))
hwbug = true;
Patches currently in stable-queue which might be from mchan@xxxxxxxxxxxx are
queue-3.4/tg3-fix-data-corruption-on-5725-with-tso.patch
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