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authorTrieu 'Andrew' Nguyen <trieux.t.nguyen@intel.com>2010-02-10 10:27:34 -0800
committerReinette Chatre <reinette.chatre@intel.com>2010-02-11 10:27:41 -0800
commit1db5950f1d0b82e07371b211a48317b8972da063 (patch)
tree6fc4f38f2c8cfd3a212c5eb18e326dd5d409ca2c /drivers/net/wireless/rt2x00
parenta9e10fb9b1c6ad16e73cf2656951fce3a817611e (diff)
iwlwifi: Monitor and recover the aggregation TX flow failure
This change monitors the tx statistics to detect the drop in throughput. When the throughput drops, the ratio of the actual_ack_count and the expected_ ack_count also drops. At the same time, the aggregated ba_timeout (the number of ba timeout retries) also rises. If the actual_ack_count/expected_ack_count ratio is 0 and the number of ba timeout retries rises to 16, no tx packets (tcp, udp, or ping - icmp) can be delivered. The driver recovers from this situation by reseting the uCode firmware. If the actual_ack_count/expected_ ack_count ratio drops below 50% (but not 0) and the aggregated ba_timeout retries just exceed 5 (but not 16), then the driver can reset the radio to bring the throughput up. Signed-off-by: Trieu 'Andrew' Nguyen <trieux.t.nguyen@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Diffstat (limited to 'drivers/net/wireless/rt2x00')
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