iwlwifi: mvm: rs: fix success ratio comparison in rs_get_best_rate

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success_ratio is actually 128 * SR in percentage while
IWL_MVM_RS_SR_NO_DECREASE is 85%. Fix this by using RS_PERCENT().
This bug caused the if branch to be always executed. This in turn
led to always selecting a rate, following a column switch, in which
the expected throughput would exceed the best expected current throughput.
In some scenarios where the success ratio isn't >85% such a rate
could be too aggressive leading us to avoid the new column.
This has the potential of causing sub optimal performance.

Reported-by: Moshe Harel <moshe.harel@intel.com>
Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

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Eyal Shapira 2015-09-21 20:03:22 +03:00 • committed by Luca Coelho

parent 40ce5ed1e9

commit ed21a384bb

1 changed files with 2 additions and 2 deletions

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drivers/net/wireless/iwlwifi/mvm/rs.c

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