Commit 1b756b37 authored Jul 05, 2022 by Steven Rostedt (Google)

usb: chipidea: tracing: Use the new __vstring() helper

Instead of open coding a __dynamic_array() with a fixed length (which
defeats the purpose of the dynamic array in the first place). Use the new
__vstring() helper that will use a va_list and only write enough of the
string into the ring buffer that is needed.

Link: https://lkml.kernel.org/r/20220705224749.991587733@goodmis.org



Cc: Peter Chen <peter.chen@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

parent c7c37bb8

drivers/usb/chipidea/trace.h

+2 −2

Original line number	Diff line number	Diff line
		@@ -28,11 +28,11 @@ TRACE_EVENT(ci_log,
		TP_ARGS(ci, vaf),
		TP_STRUCT__entry(
		__string(name, dev_name(ci->dev))
		__dynamic_array(char, msg, CHIPIDEA_MSG_MAX)
		__vstring(msg, vaf->fmt, vaf->va)
		),
		TP_fast_assign(
		__assign_str(name, dev_name(ci->dev));
		vsnprintf(__get_str(msg), CHIPIDEA_MSG_MAX, vaf->fmt, *vaf->va);
		__assign_vstr(msg, vaf->fmt, vaf->va);
		),
		TP_printk("%s: %s", __get_str(name), __get_str(msg))
		);