diff options
| author | John Youn <johnyoun@synopsys.com> | 2016-05-19 17:26:10 -0700 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2016-06-20 12:32:44 +0300 |
| commit | 89bc856e5a7462e47d90d5a3f5396bd5795efd0c (patch) | |
| tree | dc101f2c6543e6e8f46dc5b696bb9aa81cc0824e /drivers/usb/dwc3 | |
| parent | 0d25744ad107b6c9010153f3ebf8b59672b5b8e7 (diff) | |
usb: dwc3: gadget: Don't prepare TRBs if no space
If trbs_left == 0, we don't have any space left in the TRB ring so don't
prepare anything.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/dwc3')
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 6408f7ff8734..663ea9ed5993 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -942,6 +942,8 @@ static void dwc3_prepare_trbs(struct dwc3_ep *dep) BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM); trbs_left = dwc3_calc_trbs_left(dep); + if (!trbs_left) + return; list_for_each_entry_safe(req, n, &dep->pending_list, list) { if (req->request.num_mapped_sgs > 0) |