From 044d7003a7118ad4633e619a81d634cd4c35e670 Mon Sep 17 00:00:00 2001 From: Chunfeng Yun <chunfeng.yun@mediatek.com> Date: Wed, 3 Mar 2021 16:07:05 +0800 Subject: [PATCH] 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> --- drivers/usb/mtu3/mtu3_qmu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/usb/mtu3/mtu3_qmu.c b/drivers/usb/mtu3/mtu3_qmu.c index 801c2bc416..95eaf6d236 100644 --- a/drivers/usb/mtu3/mtu3_qmu.c +++ b/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; -- 2.39.5