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authorThinh Nguyen <Thinh.Nguyen@synopsys.com>2018-01-12 18:18:05 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-02-28 10:19:43 +0100
commit49e18b2ba887724ae43b1169ad0b8e747fd5aad9 (patch)
parent1075f607869283ad07a224c01b78e61b09f4bc7a (diff)
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. Cc: stable@vger.kernel.org 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 97e52c0d1a72..0ebdb313bb00 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2774,6 +2774,8 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc)
+ dwc->eps[1]->endpoint.maxpacket = dwc->gadget.ep0->maxpacket;
/* Enable USB2 LPM Capability */
if ((dwc->revision > DWC3_REVISION_194A) &&