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[1/3] rt2x00: rt2800: update initial SIFS values

Message ID 201005061229.04897.helmut.schaa@googlemail.com (mailing list archive)
State Not Applicable, archived
Headers show

Commit Message

Helmut Schaa May 6, 2010, 10:29 a.m. UTC 
None
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Patch

diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c
index e37bbea..f786068 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -1415,9 +1415,16 @@  int rt2800_init_registers(struct rt2x00_dev *rt2x00dev)
 
 	rt2800_register_write(rt2x00dev, EXP_ACK_TIME, 0x002400ca);
 
+	/*
+	 * Usually the CCK SIFS time should be set to 10 and the OFDM SIFS
+	 * time should be set to 16. However, the original Ralink driver uses
+	 * 16 for both and indeed using a value of 10 for CCK SIFS results in
+	 * connection problems with 11g + CTS protection. Hence, use the same
+	 * defaults as the Ralink driver: 16 for both, CCK and OFDM SIFS.
+	 */
 	rt2800_register_read(rt2x00dev, XIFS_TIME_CFG, &reg);
-	rt2x00_set_field32(&reg, XIFS_TIME_CFG_CCKM_SIFS_TIME, 32);
-	rt2x00_set_field32(&reg, XIFS_TIME_CFG_OFDM_SIFS_TIME, 32);
+	rt2x00_set_field32(&reg, XIFS_TIME_CFG_CCKM_SIFS_TIME, 16);
+	rt2x00_set_field32(&reg, XIFS_TIME_CFG_OFDM_SIFS_TIME, 16);
 	rt2x00_set_field32(&reg, XIFS_TIME_CFG_OFDM_XIFS_TIME, 4);
 	rt2x00_set_field32(&reg, XIFS_TIME_CFG_EIFS, 314);
 	rt2x00_set_field32(&reg, XIFS_TIME_CFG_BB_RXEND_ENABLE, 1);