rt2x00: Set MIMO PS flag in tx descriptor for STAs in dynamic SMPS mode

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c
index b66e0fd..833b157 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -437,7 +437,8 @@
 	rt2x00_desc_read(txwi, 0, &word);
 	rt2x00_set_field32(&word, TXWI_W0_FRAG,
 			   test_bit(ENTRY_TXD_MORE_FRAG, &txdesc->flags));
-	rt2x00_set_field32(&word, TXWI_W0_MIMO_PS, 0);
+	rt2x00_set_field32(&word, TXWI_W0_MIMO_PS,
+			   test_bit(ENTRY_TXD_HT_MIMO_PS, &txdesc->flags));
 	rt2x00_set_field32(&word, TXWI_W0_CF_ACK, 0);
 	rt2x00_set_field32(&word, TXWI_W0_TS,
 			   test_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc->flags));