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From 724515edd415300e12da1a3d2e84cadd6a5cd90b Mon Sep 17 00:00:00 2001
From: Ben Hutchings <bhutchings@solarflare.com>
Date: Fri, 24 Feb 2012 15:12:34 +0000
Subject: [PATCH 18/42] sfc: Fix assignment of ip_summed for pre-allocated
skbs
[ Upstream commit ff3bc1e7527504a93710535611b2f812f3bb89bf ]
When pre-allocating skbs for received packets, we set ip_summed =
CHECKSUM_UNNCESSARY. We used to change it back to CHECKSUM_NONE when
the received packet had an incorrect checksum or unhandled protocol.
Commit bc8acf2c8c3e43fcc192762a9f964b3e9a17748b ('drivers/net: avoid
some skb->ip_summed initializations') mistakenly replaced the latter
assignment with a DEBUG-only assertion that ip_summed ==
CHECKSUM_NONE. This assertion is always false, but it seems no-one
has exercised this code path in a DEBUG build.
Fix this by moving our assignment of CHECKSUM_UNNECESSARY into
efx_rx_packet_gro().
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/ethernet/sfc/rx.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/sfc/rx.c b/drivers/net/ethernet/sfc/rx.c
index 752d521..5ef4cc0 100644
--- a/drivers/net/ethernet/sfc/rx.c
+++ b/drivers/net/ethernet/sfc/rx.c
@@ -156,11 +156,10 @@ static int efx_init_rx_buffers_skb(struct efx_rx_queue *rx_queue)
if (unlikely(!skb))
return -ENOMEM;
- /* Adjust the SKB for padding and checksum */
+ /* Adjust the SKB for padding */
skb_reserve(skb, NET_IP_ALIGN);
rx_buf->len = skb_len - NET_IP_ALIGN;
rx_buf->is_page = false;
- skb->ip_summed = CHECKSUM_UNNECESSARY;
rx_buf->dma_addr = pci_map_single(efx->pci_dev,
skb->data, rx_buf->len,
@@ -499,6 +498,7 @@ static void efx_rx_packet_gro(struct efx_channel *channel,
EFX_BUG_ON_PARANOID(!checksummed);
rx_buf->u.skb = NULL;
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
gro_result = napi_gro_receive(napi, skb);
}
--
1.7.9.4
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