diff options
| author | Pratyush Anand <pratyush.anand@st.com> | 2013-01-14 15:59:35 +0530 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2013-01-18 14:30:42 +0200 |
| commit | 915e202aeeb59e272992a6364c910aaef3073544 (patch) | |
| tree | 82dacad3edaf027f778632f113fd262076c39029 /drivers/usb/dwc3/gadget.c | |
| parent | cdc359dd87ab6c39a67dab724fd0b61c16e6f08b (diff) | |
usb: dwc3: gadget: fix skip LINK_TRB on ISOC
When we reach to link trb, we just need to increase free_slot and then
calculate TRB. Return is not correct, as it will cause wrong TRB DMA
address to fetch in case of update transfer.
Cc: <stable@vger.kernel.org>
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/dwc3/gadget.c')
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index e60e72c5766..da8d57cb00e 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -754,21 +754,18 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep, struct dwc3 *dwc = dep->dwc; struct dwc3_trb *trb; - unsigned int cur_slot; - dev_vdbg(dwc->dev, "%s: req %p dma %08llx length %d%s%s\n", dep->name, req, (unsigned long long) dma, length, last ? " last" : "", chain ? " chain" : ""); - trb = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; - cur_slot = dep->free_slot; - dep->free_slot++; - /* Skip the LINK-TRB on ISOC */ - if (((cur_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && + if (((dep->free_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && usb_endpoint_xfer_isoc(dep->endpoint.desc)) - return; + dep->free_slot++; + + trb = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; + dep->free_slot++; if (!req->trb) { dwc3_gadget_move_request_queued(req); |