USB: ci13xxx_udc: Skip flushing endpoints upon failure
Flushing an endpoint involve polling ENDPTFLUSH and ENDPTSTAT
registers. The worst case timeout is 100 msec for each endpoint.
The reason for failure is unknown. When flushing an endpoint
fails, successive flushing of remaining endpoints are also failing.
Hence skip flushing remaining endpoints. Reset this condition
upon USB bus reset.
CRs-Fixed: 445916
Change-Id: I9feeeb434dc180f1df859275ef1364c7dd829d78
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index b9b8cd6..f004891 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -424,7 +424,7 @@
int n = hw_ep_bit(num, dir);
struct ci13xxx_ep *mEp = &_udc->ci13xxx_ep[n];
- if (list_empty(&mEp->qh.queue))
+ if (_udc->skip_flush || list_empty(&mEp->qh.queue))
return 0;
start = ktime_get();
@@ -440,6 +440,7 @@
__func__, num,
dir ? "IN" : "OUT");
debug_ept_flush_info(num, dir);
+ _udc->skip_flush = true;
return 0;
}
}
@@ -2259,6 +2260,7 @@
if (retval)
goto done;
+ _udc->skip_flush = false;
retval = hw_usb_reset();
if (retval)
goto done;