diff options
| author | Minas Harutyunyan <Minas.Harutyunyan@synopsys.com> | 2021-07-20 05:41:24 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-21 09:50:55 +0200 |
| commit | d53dc38857f6dbefabd9eecfcbf67b6eac9a1ef4 (patch) | |
| tree | 2d902932fe24f1e3a68735bf1ac14ef6e558addf | |
| parent | c4a0f7a6ab5417eb6105b0e1d7e6e67f6ef7d4e5 (diff) | |
usb: dwc2: gadget: Fix sending zero length packet in DDMA mode.
Sending zero length packet in DDMA mode perform by DMA descriptor
by setting SP (short packet) flag.
For DDMA in function dwc2_hsotg_complete_in() does not need to send
zlp.
Tested by USBCV MSC tests.
Fixes: f71b5e2533de ("usb: dwc2: gadget: fix zero length packet transfers")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Link: https://lore.kernel.org/r/967bad78c55dd2db1c19714eee3d0a17cf99d74a.1626777738.git.Minas.Harutyunyan@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/dwc2/gadget.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 74d25019272f..3146df6e6510 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -2749,12 +2749,14 @@ static void dwc2_hsotg_complete_in(struct dwc2_hsotg *hsotg, return; } - /* Zlp for all endpoints, for ep0 only in DATA IN stage */ + /* Zlp for all endpoints in non DDMA, for ep0 only in DATA IN stage */ if (hs_ep->send_zlp) { - dwc2_hsotg_program_zlp(hsotg, hs_ep); hs_ep->send_zlp = 0; - /* transfer will be completed on next complete interrupt */ - return; + if (!using_desc_dma(hsotg)) { + dwc2_hsotg_program_zlp(hsotg, hs_ep); + /* transfer will be completed on next complete interrupt */ + return; + } } if (hs_ep->index == 0 && hsotg->ep0_state == DWC2_EP0_DATA_IN) { |