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| author | Thinh Nguyen <Thinh.Nguyen@synopsys.com> | 2018-01-12 18:18:05 -0800 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2018-06-01 00:30:14 +0100 |
| commit | e05562277a05559c66476a1a32b4f43d493544a8 (patch) | |
| tree | 7932a5c6d73bc83e210a85ab7914a557681f1acd /drivers | |
| parent | 37ecb938a4cd48d87492c16ea3e7d843a9513b38 (diff) | |
| download | linux-e05562277a05559c66476a1a32b4f43d493544a8.tar.gz linux-e05562277a05559c66476a1a32b4f43d493544a8.tar.bz2 linux-e05562277a05559c66476a1a32b4f43d493544a8.zip | |
usb: dwc3: gadget: Set maxpacket size for ep0 IN
commit 6180026341e852a250e1f97ebdcf71684a3c81b9 upstream.
There are 2 control endpoint structures for DWC3. However, the driver
only updates the OUT direction control endpoint structure during
ConnectDone event. DWC3 driver needs to update the endpoint max packet
size for control IN endpoint as well. If the max packet size is not
properly set, then the driver will incorrectly calculate the data
transfer size and fail to send ZLP for HS/FS 3-stage control read
transfer.
The fix is simply to update the max packet size for the ep0 IN direction
during ConnectDone event.
Fixes: 72246da40f37 ("usb: Introduce DesignWare USB3 DRD Driver")
Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'drivers')
| -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 33fe3d3bebbd..47b83584f284 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1821,6 +1821,8 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) break; } + dwc->eps[1]->endpoint.maxpacket = dwc->gadget.ep0->maxpacket; + /* Disable unneded PHY */ dwc3_gadget_disable_phy(dwc, dwc->gadget.speed); |