gadget event trace : add request pointer

This allows to identify transfer request, if more than one are in queue.

This is allowed by usb_ep_queue : "Any endpoint
(except control endpoints like ep0) may have more than one transfer
request queued; they complete in FIFO order."

For example with adb gadget with function fs :

     <-transport-225   [002] d..1    47.136641: usb_ep_queue: ep1out: req ffffffc07b93ef10 length 0/24 sgs 0/0 stream 0 zsI status -115 --> 0
     ->transport-224   [000] d..1    47.153947: usb_ep_queue: ep1in: req ffffffc07c0def10 length 0/24 sgs 0/0 stream 0 zsI status -115 --> 0
              sh-452   [000] d.h2    47.153984: usb_gadget_giveback_request: ep1in: req ffffffc07c0def10 length 24/24 sgs 0/0 stream 0 zsI status 0 --> 0
              sh-452   [000] d.h.    47.154305: usb_gadget_giveback_request: ep1out: req ffffffc07b93ef10 length 24/24 sgs 0/0 stream 0 zsI status 0 --> 0
     <-transport-225   [002] d..1    47.154363: usb_ep_queue: ep1out: req ffffffc07b93ef10 length 0/21 sgs 0/0 stream 0 zsI status -115 --> 0
              sh-452   [000] d.h.    47.154378: usb_gadget_giveback_request: ep1out: req ffffffc07b93ef10 length 21/21 sgs 0/0 stream 0 zsI status 0 --> 0
     <-transport-225   [002] d..1    47.154463: usb_ep_queue: ep1out: req ffffffc07b93ef10 length 0/24 sgs 0/0 stream 0 zsI status -115 --> 0
     ->transport-224   [000] d..1    47.154583: usb_ep_queue: ep1in: req ffffffc07c0def10 length 0/24 sgs 0/0 stream 0 zsI status -115 --> 0
              sh-452   [000] d.h2    47.154600: usb_gadget_giveback_request: ep1in: req ffffffc07c0def10 length 24/24 sgs 0/0 stream 0 zsI status 0 --> 0
     ->transport-224   [000] d..1    47.164863: usb_ep_queue: ep1in: req ffffffc07c0def10 length 0/24 sgs 0/0 stream 0 zsI status -115 --> 0
     ->transport-224   [000] d.h1    47.164887: usb_gadget_giveback_request: ep1in: req ffffffc07c0def10 length 24/24 sgs 0/0 stream 0 zsI status 0 --> 0
     ->transport-224   [000] d..1    47.164907: usb_ep_queue: ep1in: req ffffffc07c0def10 length 0/122 sgs 0/0 stream 0 zsI status -115 --> 0

Signed-off-by: Matthieu CASTET <matthieu.castet@parrot.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

diff --git a/drivers/usb/gadget/udc/trace.h b/drivers/usb/gadget/udc/trace.h
index f07ddb3f4bb9d719aae7f2bececcc5c25df631af..2d1f68b5ea766c5875b6b1a6c231ff1f7bf0cfb5 100644 (file)
--- a/drivers/usb/gadget/udc/trace.h
+++ b/drivers/usb/gadget/udc/trace.h
@@ -225,6 +225,7 @@ DECLARE_EVENT_CLASS(udc_log_req,
                __field(unsigned, short_not_ok)
                __field(int, status)
                __field(int, ret)
+               __field(struct usb_request *, req)
        ),
        TP_fast_assign(
                snprintf(__get_str(name), UDC_TRACE_STR_MAX, "%s", ep->name);
@@ -238,9 +239,10 @@ DECLARE_EVENT_CLASS(udc_log_req,
                __entry->short_not_ok = req->short_not_ok;
                __entry->status = req->status;
                __entry->ret = ret;
+               __entry->req = req;
        ),
-       TP_printk("%s: length %d/%d sgs %d/%d stream %d %s%s%s status %d --> %d",
-               __get_str(name), __entry->actual, __entry->length,
+       TP_printk("%s: req %p length %d/%d sgs %d/%d stream %d %s%s%s status %d --> %d",
+               __get_str(name),__entry->req,  __entry->actual, __entry->length,
                __entry->num_mapped_sgs, __entry->num_sgs, __entry->stream_id,
                __entry->zero ? "Z" : "z",
                __entry->short_not_ok ? "S" : "s",