From: Minas Harutyunyan <hminas@xxxxxxxxxxxx>
In some cases device sending ZLP IN on non EP0 which
reassigning EP0 OUT descriptor pointer to that EP.
Dedicated for EP0 OUT descriptor multiple time re-used by
other EP while that descriptor already in use by EP0 OUT
for SETUP transaction. As result when SETUP packet received
BNA interrupt asserting.
In dwc2_hsotg_program_zlp() function dwc2_gadget_set_ep0_desc_chain()
must be called only for EP0.
Signed-off-by: Minas Harutyunyan <hminas@xxxxxxxxxxxx>
Signed-off-by: Grigor Tovmasyan <tovmasya@xxxxxxxxxxxx>
---
drivers/usb/dwc2/gadget.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 88529d092503..6b617e9d2ef3 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -1955,7 +1955,9 @@ static void dwc2_hsotg_program_zlp(struct dwc2_hsotg *hsotg,
/* Not specific buffer needed for ep0 ZLP */
dma_addr_t dma = hs_ep->desc_list_dma;
- dwc2_gadget_set_ep0_desc_chain(hsotg, hs_ep);
+ if (!index)
+ dwc2_gadget_set_ep0_desc_chain(hsotg, hs_ep);
+
dwc2_gadget_config_nonisoc_xfer_ddma(hs_ep, dma, 0);
} else {
dwc2_writel(DXEPTSIZ_MC(1) | DXEPTSIZ_PKTCNT(1) |
--
2.11.0
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