diff options
| author | Chunfeng Yun <[email protected]> | 2021-03-03 16:07:05 +0800 |
|---|---|---|
| committer | Marek Vasut <[email protected]> | 2021-03-10 11:48:09 +0100 |
| commit | 044d7003a7118ad4633e619a81d634cd4c35e670 (patch) | |
| tree | 51b2faad7b99b20cddf95cf2e6bc7900499c23f9 | |
| parent | b764bf21e60901133fd5eec6a003409c581dd519 (diff) | |
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 <[email protected]>
| -rw-r--r-- | drivers/usb/mtu3/mtu3_qmu.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/mtu3/mtu3_qmu.c b/drivers/usb/mtu3/mtu3_qmu.c index 801c2bc416d..95eaf6d2365 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; |