netdev - [PATCH net] sfc: remove incorrect EFX_BUG_ON

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Message-ID: <alpine.LFD.2.03.1410211353290.26215@solarflare.com>
Date:	Tue, 21 Oct 2014 14:50:29 +0100
From:	Edward Cree <ecree@...arflare.com>
To:	<davem@...emloft.net>, <netdev@...r.kernel.org>
CC:	<sshah@...arflare.com>, <jcooper@...arflare.com>,
	<linux-net-drivers@...arflare.com>
Subject: [PATCH net] sfc: remove incorrect EFX_BUG_ON_PARANOID check

From: Jon Cooper <jcooper@...arflare.com>

write_count and insert_count can wrap around, making > check invalid.

Fixes: 70b33fb0ddec827cbbd14cdc664fc27b2ef4a6b6 ("sfc: add support for
 skb->xmit_more").

Signed-off-by: Edward Cree <ecree@...arflare.com>
---
Compile tested only.

 drivers/net/ethernet/sfc/tx.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/net/ethernet/sfc/tx.c b/drivers/net/ethernet/sfc/tx.c
index ee84a90..aaf2987 100644
--- a/drivers/net/ethernet/sfc/tx.c
+++ b/drivers/net/ethernet/sfc/tx.c
@@ -343,8 +343,6 @@ netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb)
 	unsigned short dma_flags;
 	int i = 0;
 
-	EFX_BUG_ON_PARANOID(tx_queue->write_count > tx_queue->insert_count);
-
 	if (skb_shinfo(skb)->gso_size)
 		return efx_enqueue_skb_tso(tx_queue, skb);
 
@@ -1258,8 +1256,6 @@ static int efx_enqueue_skb_tso(struct efx_tx_queue *tx_queue,
 	/* Find the packet protocol and sanity-check it */
 	state.protocol = efx_tso_check_protocol(skb);
 
-	EFX_BUG_ON_PARANOID(tx_queue->write_count > tx_queue->insert_count);
-
 	rc = tso_start(&state, efx, skb);
 	if (rc)
 		goto mem_err;
-- 
1.7.11.7

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