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rtlwifi: rtl8192se: Use write barrier when assigning ownership 

As noted by Mike McCormack <mikem@ring3k.org> for rtl8192ce, make sure
all updates to a descriptor are flushed to memory before assigning ownship
to hardware.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Larry Finger 2011-05-23 20:37:31 -05:00 committed by John W. Linville
parent 4a7f5db19c
commit 5111dd3e42
1 changed files with 4 additions and 0 deletions
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4
drivers/net/wireless/rtlwifi/rtl8192se/trx.c
View File

@ -873,6 +873,7 @@ void rtl92se_tx_fill_cmddesc(struct ieee80211_hw *hw, u8 *pdesc,
SET_TX_DESC_TX_BUFFER_SIZE(pdesc, (u16)(skb->len));
SET_TX_DESC_TX_BUFFER_ADDRESS(pdesc, cpu_to_le32(mapping));
wmb();
SET_TX_DESC_OWN(pdesc, 1);
} else { /* H2C Command Desc format (Host TXCMD) */
/* 92SE must set as 1 for firmware download HW DMA error */
@ -891,6 +892,7 @@ void rtl92se_tx_fill_cmddesc(struct ieee80211_hw *hw, u8 *pdesc,
SET_TX_DESC_TX_BUFFER_SIZE(pdesc, (u16)(skb->len));
SET_TX_DESC_TX_BUFFER_ADDRESS(pdesc, cpu_to_le32(mapping));
wmb();
SET_TX_DESC_OWN(pdesc, 1);
}
@ -901,6 +903,7 @@ void rtl92se_set_desc(u8 *pdesc, bool istx, u8 desc_name, u8 *val)
if (istx == true) {
switch (desc_name) {
case HW_DESC_OWN:
wmb();
SET_TX_DESC_OWN(pdesc, 1);
break;
case HW_DESC_TX_NEXTDESC_ADDR:
@ -914,6 +917,7 @@ void rtl92se_set_desc(u8 *pdesc, bool istx, u8 desc_name, u8 *val)
} else {
switch (desc_name) {
case HW_DESC_RXOWN:
wmb();
SET_RX_STATUS_DESC_OWN(pdesc, 1);
break;
case HW_DESC_RXBUFF_ADDR: