Procházet zdrojové kódy

usb: mtu3: flush cache for next GPD

When flush cache of the current GPD and resume QMU, the controller
will try to access the next GPD after processing the current one,
if not flush the next GPD, the controller may get wrong GPD status.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Chunfeng Yun před 3 roky
rodič
revize
044d7003a7
1 změnil soubory, kde provedl 3 přidání a 0 odebrání
  1. 3 0
      drivers/usb/mtu3/mtu3_qmu.c

+ 3 - 0
drivers/usb/mtu3/mtu3_qmu.c

@@ -198,6 +198,7 @@ static int mtu3_prepare_tx_gpd(struct mtu3_ep *mep, struct mtu3_request *mreq)
 
 	enq->flag &= ~GPD_FLAGS_HWO;
 	gpd->next_gpd = cpu_to_le32((u32)gpd_virt_to_dma(ring, enq));
+	mtu3_flush_cache((uintptr_t)enq, sizeof(*gpd));
 
 	if (req->zero)
 		gpd->ext_flag |= GPD_EXT_FLAG_ZLP;
@@ -234,6 +235,8 @@ static int mtu3_prepare_rx_gpd(struct mtu3_ep *mep, struct mtu3_request *mreq)
 
 	enq->flag &= ~GPD_FLAGS_HWO;
 	gpd->next_gpd = cpu_to_le32((u32)gpd_virt_to_dma(ring, enq));
+	mtu3_flush_cache((uintptr_t)enq, sizeof(*gpd));
+
 	gpd->flag |= GPD_FLAGS_IOC | GPD_FLAGS_HWO;
 
 	mreq->gpd = gpd;