[PATCH 08/33] xhci: trace stream context at Set TR Deq command completion

[Mathias Nyman <mathias.nyman@linux.intel.com>]

A successful 'Set TR Deq' command writes a new dequeue pointer to the
stream context for stream rings, show the content of the stream ctx
at command completion.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
---
 drivers/usb/host/xhci-ring.c  | 14 +++++++++-----
 drivers/usb/host/xhci-trace.h |  5 +++++
 2 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index f7f7b0a818f8..f62b243d0fc4 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1338,6 +1338,7 @@ static void xhci_handle_cmd_set_deq(struct xhci_hcd *xhci, int slot_id,
 	struct xhci_virt_ep *ep;
 	struct xhci_ep_ctx *ep_ctx;
 	struct xhci_slot_ctx *slot_ctx;
+	struct xhci_stream_ctx *stream_ctx;
 	struct xhci_td *td, *tmp_td;
 	bool deferred = false;
 
@@ -1360,6 +1361,11 @@ static void xhci_handle_cmd_set_deq(struct xhci_hcd *xhci, int slot_id,
 	trace_xhci_handle_cmd_set_deq(slot_ctx);
 	trace_xhci_handle_cmd_set_deq_ep(ep_ctx);
 
+	if (ep->ep_state & EP_HAS_STREAMS) {
+		stream_ctx = &ep->stream_info->stream_ctx_array[stream_id];
+		trace_xhci_handle_cmd_set_deq_stream(ep->stream_info, stream_id);
+	}
+
 	if (cmd_comp_code != COMP_SUCCESS) {
 		unsigned int ep_state;
 		unsigned int slot_state;
@@ -1396,9 +1402,7 @@ static void xhci_handle_cmd_set_deq(struct xhci_hcd *xhci, int slot_id,
 		u64 deq;
 		/* 4.6.10 deq ptr is written to the stream ctx for streams */
 		if (ep->ep_state & EP_HAS_STREAMS) {
-			struct xhci_stream_ctx *ctx =
-				&ep->stream_info->stream_ctx_array[stream_id];
-			deq = le64_to_cpu(ctx->stream_ring) & SCTX_DEQ_MASK;
+			deq = le64_to_cpu(stream_ctx->stream_ring) & SCTX_DEQ_MASK;
 
 			/*
 			 * Cadence xHCI controllers store some endpoint state
@@ -1410,8 +1414,8 @@ static void xhci_handle_cmd_set_deq(struct xhci_hcd *xhci, int slot_id,
 			 * To fix this issue driver must clear Rsvd0 field.
 			 */
 			if (xhci->quirks & XHCI_CDNS_SCTX_QUIRK) {
-				ctx->reserved[0] = 0;
-				ctx->reserved[1] = 0;
+				stream_ctx->reserved[0] = 0;
+				stream_ctx->reserved[1] = 0;
 			}
 		} else {
 			deq = le64_to_cpu(ep_ctx->deq) & ~EP_CTX_CYCLE_MASK;
diff --git a/drivers/usb/host/xhci-trace.h b/drivers/usb/host/xhci-trace.h
index 56af9f62916a..bfb5c5c17012 100644
--- a/drivers/usb/host/xhci-trace.h
+++ b/drivers/usb/host/xhci-trace.h
@@ -340,6 +340,11 @@ DEFINE_EVENT(xhci_log_stream_ctx, xhci_alloc_stream_info_ctx,
 	TP_ARGS(info, stream_id)
 );
 
+DEFINE_EVENT(xhci_log_stream_ctx, xhci_handle_cmd_set_deq_stream,
+	TP_PROTO(struct xhci_stream_info *info, unsigned int stream_id),
+	TP_ARGS(info, stream_id)
+);
+
 DECLARE_EVENT_CLASS(xhci_log_ep_ctx,
 	TP_PROTO(struct xhci_ep_ctx *ctx),
 	TP_ARGS(ctx),
-- 
2.25.1