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rtlwifi: Use write barrier when assigning ownership 

Make sure all updates to a descriptor are flushed to memory
before assigning ownship to hardware.

Signed-off-by: Mike McCormack <mikem@ring3k.org>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Mike McCormack 2011-05-31 08:50:07 +09:00 committed by John W. Linville
parent febc9fe538
commit 71352b2318
1 changed files with 2 additions and 0 deletions
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2
drivers/net/wireless/rtlwifi/rtl8192ce/trx.c
View File

@ -930,6 +930,7 @@ void rtl92ce_set_desc(u8 *pdesc, bool istx, u8 desc_name, u8 *val)
if (istx == true) { if (istx == true) {
switch (desc_name) { switch (desc_name) {
case HW_DESC_OWN: case HW_DESC_OWN:
wmb();
SET_TX_DESC_OWN(pdesc, 1); SET_TX_DESC_OWN(pdesc, 1);
break; break;
case HW_DESC_TX_NEXTDESC_ADDR: case HW_DESC_TX_NEXTDESC_ADDR:
@ -943,6 +944,7 @@ void rtl92ce_set_desc(u8 *pdesc, bool istx, u8 desc_name, u8 *val)
} else { } else {
switch (desc_name) { switch (desc_name) {
case HW_DESC_RXOWN: case HW_DESC_RXOWN:
wmb();
SET_RX_DESC_OWN(pdesc, 1); SET_RX_DESC_OWN(pdesc, 1);
break; break;
case HW_DESC_RXBUFF_ADDR: case HW_DESC_RXBUFF_ADDR: