scsi: qla2xxx: 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/20220705224750.896553364@goodmis.org
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

diff --git a/include/trace/events/qla.h b/include/trace/events/qla.h
index 5857cf6..e7fd55e 100644 (file)
--- a/include/trace/events/qla.h
+++ b/include/trace/events/qla.h
@@ -22,11 +22,11 @@ DECLARE_EVENT_CLASS(qla_log_event,
 
        TP_STRUCT__entry(
                __string(buf, buf)
-               __dynamic_array(char, msg, QLA_MSG_MAX)
+               __vstring(msg, vaf->fmt, vaf->va)
        ),
        TP_fast_assign(
                __assign_str(buf, buf);
-               vsnprintf(__get_str(msg), QLA_MSG_MAX, vaf->fmt, *vaf->va);
+               __assign_vstr(msg, vaf->fmt, vaf->va);
        ),
 
        TP_printk("%s %s", __get_str(buf), __get_str(msg))