This allow to identify transfert 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 :
[00:59:36.655980] <-transport-223 [002] d..1 112.529723: usb_ep_queue: ep1out: req[ffffffc07cbab610] length 0/24 sgs 0/0 stream 0 zsI status -115 --> 0
[00:59:36.672086] <idle>-0 [000] d.h1 112.600725: usb_gadget_giveback_request: ep1out: req[ffffffc07cbab610] length 24/24 sgs 0/0 stream 0 zsI status 0 --> 0
[00:59:36.688087] <-transport-223 [002] d..1 112.600878: usb_ep_queue: ep1out: req[ffffffc07cbab610] length 0/6 sgs 0/0 stream 0 zsI status -115 --> 0
[00:59:36.704085] <idle>-0 [000] d.h1 112.600918: usb_gadget_giveback_request: ep1out: req[ffffffc07cbab610] length 6/6 sgs 0/0 stream 0 zsI status 0 --> 0
[00:59:36.704090] <-transport-223 [002] d..1 112.600994: usb_ep_queue: ep1out: req[ffffffc07cbab610] length 0/24 sgs 0/0 stream 0 zsI status -115 --> 0
[00:59:36.720080] ->transport-222 [002] d..1 112.601150: usb_ep_queue: ep1in: req[ffffffc07c234710] length 0/24 sgs 0/0 stream 0 zsI status -115 --> 0
[00:59:36.736087] <idle>-0 [000] d.h1 112.601171: usb_gadget_giveback_request: ep1in: req[ffffffc07c234710] length 24/24 sgs 0/0 stream 0 zsI status 0 --> 0
[00:59:36.752082] ->transport-222 [002] d..1 112.602262: usb_ep_queue: ep1in: req[ffffffc07c234710] length 0/24 sgs 0/0 stream 0 zsI status -115 --> 0
[00:59:36.768084] sh-448 [000] dnh1 112.602300: usb_gadget_giveback_request: ep1in: req[ffffffc07c234710] length 24/24 sgs 0/0 stream 0 zsI status 0 --> 0
[00:59:36.784082] ->transport-222 [002] d..1 112.602331: usb_ep_queue: ep1in: req[ffffffc07c234710] length 0/7 sgs 0/0 stream 0 zsI status -115 --> 0
[00:59:36.784088] ls-452 [000] d.h1 112.602411: usb_gadget_giveback_request: ep1in: req[ffffffc07c234710] length 7/7 sgs 0/0 stream 0 zsI status 0 --> 0
[00:59:36.800117] ls-452 [000] d.h1 112.602721: usb_gadget_giveback_request: ep1out: req[ffffffc07cbab610] length 24/24 sgs 0/0 stream 0 zsI status 0 --> 0
Signed-off-by: Matthieu CASTET <matthieu.castet@xxxxxxxxxx>
---
drivers/usb/gadget/udc/trace.h | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/gadget/udc/trace.h b/drivers/usb/gadget/udc/trace.h
index f07ddb3f4bb9..99feb4a07e20 100644
--- 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",
--
2.15.0
--
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