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I have a system with a Chelsio adapter (driven by cxgb3) whose ports are part of a Linux bridge. Recently I updated the kernel and discovered that things stopped working because cxgb3 was doing LRO on packets that were passed into the bridge code for forwarding. (Incidentally, this problem manifested itself in a strange way that made debugging a bit interesting -- for some reason, the skb_warn_if_lro() check in bridge didn't trigger and these LROed packets were forwarded out a forcedeth interface, and caused the forcedeth transmit path to get stuck) This is because cxgb3 has no way of keeping state for the LRO flag until the interface is brought up, so if the bridging code disables LRO while the interface is down, then cxgb3_up() will just reenable LRO, and on my Debian system at least, the init scripts add interfaces to a bridge before bringing the interfaces up. Fix this by keeping track of each interface's LRO state in cxgb3 so that when bridge disables LRO, it stays disabled in cxgb3_up() when the interface is brought up. I did this by changing the rx_csum_offload flag into a pair of bit flags; the effect of this on the rx_eth() fast path is miniscule enough that it should be fine (eg on x86, a cmpb instruction becomes a testb instruction). Signed-off-by: Roland Dreier <rolandd@cisco.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| .. | ||
| adapter.h | ||
| ael1002.c | ||
| common.h | ||
| cxgb3_ctl_defs.h | ||
| cxgb3_defs.h | ||
| cxgb3_ioctl.h | ||
| cxgb3_main.c | ||
| cxgb3_offload.c | ||
| cxgb3_offload.h | ||
| firmware_exports.h | ||
| l2t.c | ||
| l2t.h | ||
| Makefile | ||
| mc5.c | ||
| regs.h | ||
| sge.c | ||
| sge_defs.h | ||
| t3_cpl.h | ||
| t3_hw.c | ||
| t3cdev.h | ||
| version.h | ||
| vsc8211.c | ||
| xgmac.c | ||