diff options
| author | Felipe Balbi <balbi@ti.com> | 2012-10-04 10:58:00 +0200 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2012-10-15 14:03:03 +0200 |
| commit | 041d81f493d90c940ec41f0ec98bc7c4f2fba431 (patch) | |
| tree | e05bc2681fea268de08c0ab9c6eb593381f5d3c3 /drivers/usb/dwc3/gadget.c | |
| parent | Linux 3.7-rc1 (diff) | |
| download | linux-041d81f493d90c940ec41f0ec98bc7c4f2fba431.tar.xz linux-041d81f493d90c940ec41f0ec98bc7c4f2fba431.zip | |
usb: dwc3: gadget: fix 'endpoint always busy' bug
If a USB transfer has already been started, meaning
we have already issued StartTransfer command to that
particular endpoint, DWC3_EP_BUSY flag has also
already been set.
When we try to cancel this transfer which is already
in controller's cache, we will not receive XferComplete
event and we must clear DWC3_EP_BUSY in order to allow
subsequent requests to be properly started.
The best place to clear that flag is right after issuing
DWC3_DEPCMD_ENDTRANSFER.
Cc: stable@vger.kernel.org # v3.4 v3.5 v3.6
Reported-by: Moiz Sonasath <m-sonasath@ti.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 | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index c9e729a4bf65..7b7deddf6a52 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1904,7 +1904,7 @@ static void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum) ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); WARN_ON_ONCE(ret); dep->resource_index = 0; - + dep->flags &= ~DWC3_EP_BUSY; udelay(100); } |