diff options
| author | Janusz Dziedzic <januszx.dziedzic@linux.intel.com> | 2016-11-09 11:01:35 +0100 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2016-11-18 13:54:15 +0200 |
| commit | f2694a93e0df86e89a2d1743d413bf1bf5d2da50 (patch) | |
| tree | d0b712eb3be0460ced434acfd2eed1d36b399e6a /drivers/usb/dwc3 | |
| parent | 87aba10639b083dacdd13b43557649b3d001c4b4 (diff) | |
usb: dwc3: warn on once when no trbs
Seems last time we hit few issues where
we get trb_left = 0, mainly because of
HWO bit still set in previous TRB.
Add warn on once to catch/fix such
problems much faster.
Signed-off-by: Janusz Dziedzic <januszx.dziedzic@linux.intel.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 | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 37d3de41123c..7e465ea6a211 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -937,6 +937,7 @@ static struct dwc3_trb *dwc3_ep_prev_trb(struct dwc3_ep *dep, u8 index) static u32 dwc3_calc_trbs_left(struct dwc3_ep *dep) { struct dwc3_trb *tmp; + struct dwc3 *dwc = dep->dwc; u8 trbs_left; /* @@ -948,7 +949,8 @@ static u32 dwc3_calc_trbs_left(struct dwc3_ep *dep) */ if (dep->trb_enqueue == dep->trb_dequeue) { tmp = dwc3_ep_prev_trb(dep, dep->trb_enqueue); - if (tmp->ctrl & DWC3_TRB_CTRL_HWO) + if (dev_WARN_ONCE(dwc->dev, tmp->ctrl & DWC3_TRB_CTRL_HWO, + "%s No TRBS left\n", dep->name)) return 0; return DWC3_TRB_NUM - 1; |