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usb: mtu3: flush cache for next GPD

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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>
This commit is contained in:
Chunfeng Yun 2021-03-03 16:07:05 +08:00 • committed by Marek Vasut
parent b764bf21e6
commit 044d7003a7
1 changed files with 3 additions and 0 deletions
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3
drivers/usb/mtu3/mtu3_qmu.c
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@ -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;