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xhci: tracing: Use the new __vstring() helper

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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>
This commit is contained in:
Steven Rostedt (Google) 2022-07-05 18:45:00 -04:00
parent 1b756b372f
commit 0ba4c9dede
1 changed files with 2 additions and 2 deletions
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4
drivers/usb/host/xhci-trace.h
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@ -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))
);