Commit 0ba4c9de authored Jul 05, 2022 by Steven Rostedt (Google)

xhci: 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/20220705224750.172301548@goodmis.org



Cc: Mathias Nyman <mathias.nyman@intel.com>
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 1b756b37

drivers/usb/host/xhci-trace.h

+2 −2

Original line number	Diff line number	Diff line
		@@ -28,9 +28,9 @@
		DECLARE_EVENT_CLASS(xhci_log_msg,
		TP_PROTO(struct va_format *vaf),
		TP_ARGS(vaf),
		TP_STRUCT__entry(__dynamic_array(char, msg, XHCI_MSG_MAX)),
		TP_STRUCT__entry(__vstring(msg, vaf->fmt, vaf->va)),
		TP_fast_assign(
		vsnprintf(__get_str(msg), XHCI_MSG_MAX, vaf->fmt, *vaf->va);
		__assign_vstr(msg, vaf->fmt, vaf->va);
		),
		TP_printk("%s", __get_str(msg))
		);