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rt2x00: Fix EIFS timing value

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Olivier reported a difference between the EIFS
values used in the legacy driver and the one in
the rt2x00 drivers.

In rt2x00 the value was
	( SIFS + (8 * (IEEE80211_HEADER + ACK_SIZE)) )
which comes down to 314us while the legacy driver uses the value 364us

This was caused because EIFS is: SIFS + DIFS + AckTime
This patch will fix this by adding the DIFS by the above value,
and creating a SHORT_EIFS define which uses the SHORT_DIFS.

Reported-by: Olivier Cornu <o.cornu@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:
Ivo van Doorn
2008-07-19 16:16:12 +02:00
committed by John W. Linville
parent ed06387b44
commit f2fdbc4847
2 changed files with 5 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/net/wireless/rt2x00/rt2x00.h
View File

@@ -108,7 +108,10 @@
#define SHORT_PIFS ( SIFS + SHORT_SLOT_TIME )
#define DIFS ( PIFS + SLOT_TIME )
#define SHORT_DIFS ( SHORT_PIFS + SHORT_SLOT_TIME )
#define EIFS ( SIFS + (8 * (IEEE80211_HEADER + ACK_SIZE)) )
#define EIFS ( SIFS + DIFS + \
(8 * (IEEE80211_HEADER + ACK_SIZE)) )
#define SHORT_EIFS ( SIFS + SHORT_DIFS + \
(8 * (IEEE80211_HEADER + ACK_SIZE)) )
/*
* Chipset identification