Author: yongari
Date: Mon Jun 29 05:12:21 2009
New Revision: 195153
URL: http://svn.freebsd.org/changeset/base/195153
Log:
Disable Rx checksum offload until I find more clue why it breaks
under certain environments. However give users chance to override
it when he/she surely knows his/her hardware works with Rx checksum
offload.
Reported by: Ulrich Spoerlein ( uqs <> spoerlein dot net )
MFC after: 1 week
Approved by: re (kensmith)
Modified:
head/sys/dev/ale/if_ale.c
Modified: head/sys/dev/ale/if_ale.c
==============================================================================
--- head/sys/dev/ale/if_ale.c Mon Jun 29 01:33:59 2009 (r195152)
+++ head/sys/dev/ale/if_ale.c Mon Jun 29 05:12:21 2009 (r195153)
@@ -620,6 +620,14 @@ ale_attach(device_t dev)
ifp->if_capabilities |= IFCAP_VLAN_MTU;
ifp->if_capabilities |= IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_HWCSUM;
ifp->if_capenable = ifp->if_capabilities;
+ /*
+ * Even though controllers supported by ale(3) have Rx checksum
+ * offload bug the workaround for fragmented frames seemed to
+ * work so far. However it seems Rx checksum offload does not
+ * work under certain conditions. So disable Rx checksum offload
+ * until I find more clue about it but allow users to override it.
+ */
+ ifp->if_capenable &= ~IFCAP_RXCSUM;
/* Tell the upper layer(s) we support long frames. */
ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header);
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