rt2x00: Fix tx status reporting when falling back to the lowest rate

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In some corner cases the reported tx rates/retries didn't match the really
used ones.

The hardware lowers the tx rate on each consecutive retry by 1 (but won't
fall back from MCS to legacy rates) _until_ it reaches the lowest one.

In case the frame wasn't sent succesful the number of retries is 7 and if
a rate index <7 was used the previous code reported negative rate indexes
which were then ignored by the rate control algorithm and mac80211.

Instead, report the remaining number of retries to have happened with
the lowest rate (index 0). This should give the rate control algorithm
slightly more accurate information about the used tx rates/retries.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

...

This commit is contained in:

Helmut Schaa 2010-06-14 22:12:26 +02:00 • committed by John W. Linville

parent 3f2bee2499

commit 3d2bc1036a

1 changed files with 12 additions and 1 deletions

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drivers/net/wireless/rt2x00/rt2x00dev.c

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