Process all completed urbs, if more urbs are complete by the time
driver processes completion interrupt.
Signed-off-by: Gregory Herrero <gregory.herr...@intel.com>
---
drivers/usb/dwc2/hcd_ddma.c | 38 ++++++++++++++++++++++++++++++++++++--
1 file changed, 36 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/dwc2/hcd_ddma.c b/drivers/usb/dwc2/hcd_ddma.c
index edccac6..f98c7e91 100644
--- a/drivers/usb/dwc2/hcd_ddma.c
+++ b/drivers/usb/dwc2/hcd_ddma.c
@@ -940,17 +940,51 @@ static void dwc2_complete_isoc_xfer_ddma(struct
dwc2_hsotg *hsotg,
list_for_each_entry_safe(qtd, qtd_tmp, &qh->qtd_list, qtd_list_entry) {
if (!qtd->in_process)
break;
+
+ /*
+ * Ensure idx corresponds to descriptor where first urb of this
+ * qtd was added. In fact, during isoc desc init, dwc2 may skip
+ * an index if current frame number is already over this index.
+ */
+ if (idx != qtd->isoc_td_first) {
+ dev_vdbg(hsotg->dev,
+ "try to complete %d instead of %d\n",
+ idx, qtd->isoc_td_first);
+ idx = qtd->isoc_td_first;
+ }
+
do {
+ struct dwc2_qtd *qtd_next;
+ u16 cur_idx;
+
rc = dwc2_cmpl_host_isoc_dma_desc(hsotg, chan, qtd, qh,
idx);
if (rc < 0)
return;
idx = dwc2_desclist_idx_inc(idx, qh->interval,
chan->speed);
- if (rc == DWC2_CMPL_STOP)
- goto stop_scan;
+ if (!rc)
+ continue;
+
if (rc == DWC2_CMPL_DONE)
break;
+
+ /* rc == DWC2_CMPL_STOP */
+
+ if (qh->interval >= 32)
+ goto stop_scan;
+
+ qh->td_first = idx;
+ cur_idx = dwc2_frame_list_idx(hsotg->frame_number);
+ qtd_next = list_first_entry(&qh->qtd_list,
+ struct dwc2_qtd,
+ qtd_list_entry);
+ if (dwc2_frame_idx_num_gt(cur_idx,
+ qtd_next->isoc_td_last))
+ break;
+
+ goto stop_scan;
+
} while (idx != qh->td_first);
}
--
2.6.1
--
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