From: Edward Cree ecree@solarflare.com
[ Upstream commit 4b1bd9db078f7d5332c8601a2f5bd43cf0458fd4 ]
It's a resource, not a parameter, so we can't copy it into the new channel's TX queues, otherwise aliasing will lead to resource- management bugs if the channel is subsequently torn down without being initialised.
Before the Fixes:-tagged commit there was a similar bug with tsoh_page, but I'm not sure it's worth doing another fix for such old kernels.
Fixes: e9117e5099ea ("sfc: Firmware-Assisted TSO version 2") Suggested-by: Derek Shute Derek.Shute@stratus.com Signed-off-by: Edward Cree ecree@solarflare.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/sfc/efx.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/net/ethernet/sfc/efx.c +++ b/drivers/net/ethernet/sfc/efx.c @@ -519,6 +519,7 @@ efx_copy_channel(const struct efx_channe if (tx_queue->channel) tx_queue->channel = channel; tx_queue->buffer = NULL; + tx_queue->cb_page = NULL; memset(&tx_queue->txd, 0, sizeof(tx_queue->txd)); }