tracing/ath: 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/20220705224749.430339634@goodmis.org

Cc: Kalle Valo <kvalo@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: ath10k@lists.infradead.org
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: ath11k@lists.infradead.org
Acked-by: Kalle Valo <kvalo@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

5 files changed, 14 insertions, 35 deletions

diff --git a/drivers/net/wireless/ath/ath10k/trace.h b/drivers/net/wireless/ath/ath10k/trace.h
index 4714c86bb501..64e7a767d963 100644
--- a/drivers/net/wireless/ath/ath10k/trace.h
+++ b/drivers/net/wireless/ath/ath10k/trace.h
@@ -52,15 +52,12 @@ DECLARE_EVENT_CLASS(ath10k_log_event,
 	TP_STRUCT__entry(
 		__string(device, dev_name(ar->dev))
 		__string(driver, dev_driver_string(ar->dev))
-		__dynamic_array(char, msg, ATH10K_MSG_MAX)
+		__vstring(msg, vaf->fmt, vaf->va)
 	),
 	TP_fast_assign(
 		__assign_str(device, dev_name(ar->dev));
 		__assign_str(driver, dev_driver_string(ar->dev));
-		WARN_ON_ONCE(vsnprintf(__get_dynamic_array(msg),
-				       ATH10K_MSG_MAX,
-				       vaf->fmt,
-				       *vaf->va) >= ATH10K_MSG_MAX);
+		__assign_vstr(msg, vaf->fmt, vaf->va);
 	),
 	TP_printk(
 		"%s %s %s",
@@ -92,16 +89,13 @@ TRACE_EVENT(ath10k_log_dbg,
 		__string(device, dev_name(ar->dev))
 		__string(driver, dev_driver_string(ar->dev))
 		__field(unsigned int, level)
-		__dynamic_array(char, msg, ATH10K_MSG_MAX)
+		__vstring(msg, vaf->fmt, vaf->va)
 	),
 	TP_fast_assign(
 		__assign_str(device, dev_name(ar->dev));
 		__assign_str(driver, dev_driver_string(ar->dev));
 		__entry->level = level;
-		WARN_ON_ONCE(vsnprintf(__get_dynamic_array(msg),
-				       ATH10K_MSG_MAX,
-				       vaf->fmt,
-				       *vaf->va) >= ATH10K_MSG_MAX);
+		__assign_vstr(msg, vaf->fmt, vaf->va);
 	),
 	TP_printk(
 		"%s %s %s",
diff --git a/drivers/net/wireless/ath/ath11k/trace.h b/drivers/net/wireless/ath/ath11k/trace.h
index a02e54735e88..76560587bea0 100644
--- a/drivers/net/wireless/ath/ath11k/trace.h
+++ b/drivers/net/wireless/ath/ath11k/trace.h
@@ -126,15 +126,12 @@ DECLARE_EVENT_CLASS(ath11k_log_event,
 	TP_STRUCT__entry(
 		__string(device, dev_name(ab->dev))
 		__string(driver, dev_driver_string(ab->dev))
-		__dynamic_array(char, msg, ATH11K_MSG_MAX)
+		__vstring(msg, vaf->fmt, vaf->va)
 	),
 	TP_fast_assign(
 		__assign_str(device, dev_name(ab->dev));
 		__assign_str(driver, dev_driver_string(ab->dev));
-		WARN_ON_ONCE(vsnprintf(__get_dynamic_array(msg),
-				       ATH11K_MSG_MAX,
-				       vaf->fmt,
-				       *vaf->va) >= ATH11K_MSG_MAX);
+		__assign_vstr(msg, vaf->fmt, vaf->va);
 	),
 	TP_printk(
 		"%s %s %s",
diff --git a/drivers/net/wireless/ath/ath6kl/trace.h b/drivers/net/wireless/ath/ath6kl/trace.h
index a3d3740419eb..231a94769ddb 100644
--- a/drivers/net/wireless/ath/ath6kl/trace.h
+++ b/drivers/net/wireless/ath/ath6kl/trace.h
@@ -253,13 +253,10 @@ DECLARE_EVENT_CLASS(ath6kl_log_event,
 	TP_PROTO(struct va_format *vaf),
 	TP_ARGS(vaf),
 	TP_STRUCT__entry(
-		__dynamic_array(char, msg, ATH6KL_MSG_MAX)
+		__vstring(msg, vaf->fmt, vaf->va)
 	),
 	TP_fast_assign(
-		WARN_ON_ONCE(vsnprintf(__get_dynamic_array(msg),
-				       ATH6KL_MSG_MAX,
-				       vaf->fmt,
-				       *vaf->va) >= ATH6KL_MSG_MAX);
+		__assign_vstr(msg, vaf->fmt, vaf->va);
 	),
 	TP_printk("%s", __get_str(msg))
 );
@@ -284,14 +281,11 @@ TRACE_EVENT(ath6kl_log_dbg,
 	TP_ARGS(level, vaf),
 	TP_STRUCT__entry(
 		__field(unsigned int, level)
-		__dynamic_array(char, msg, ATH6KL_MSG_MAX)
+		__vstring(msg, vaf->fmt, vaf->va)
 	),
 	TP_fast_assign(
 		__entry->level = level;
-		WARN_ON_ONCE(vsnprintf(__get_dynamic_array(msg),
-				       ATH6KL_MSG_MAX,
-				       vaf->fmt,
-				       *vaf->va) >= ATH6KL_MSG_MAX);
+		__assign_vstr(msg, vaf->fmt, vaf->va);
 	),
 	TP_printk("%s", __get_str(msg))
 );
diff --git a/drivers/net/wireless/ath/trace.h b/drivers/net/wireless/ath/trace.h
index ba711644d27e..9935cf475b6d 100644
--- a/drivers/net/wireless/ath/trace.h
+++ b/drivers/net/wireless/ath/trace.h
@@ -40,16 +40,13 @@ TRACE_EVENT(ath_log,
 	    TP_STRUCT__entry(
 		    __string(device, wiphy_name(wiphy))
 		    __string(driver, KBUILD_MODNAME)
-		    __dynamic_array(char, msg, ATH_DBG_MAX_LEN)
+		    __vstring(msg, vaf->fmt, vaf->va)
 	    ),
 
 	    TP_fast_assign(
 		    __assign_str(device, wiphy_name(wiphy));
 		    __assign_str(driver, KBUILD_MODNAME);
-		    WARN_ON_ONCE(vsnprintf(__get_dynamic_array(msg),
-					   ATH_DBG_MAX_LEN,
-					   vaf->fmt,
-					   *vaf->va) >= ATH_DBG_MAX_LEN);
+		    __assign_vstr(msg, vaf->fmt, vaf->va);
 	    ),
 
 	    TP_printk(
diff --git a/drivers/net/wireless/ath/wil6210/trace.h b/drivers/net/wireless/ath/wil6210/trace.h
index 11c989e95880..201f44612c31 100644
--- a/drivers/net/wireless/ath/wil6210/trace.h
+++ b/drivers/net/wireless/ath/wil6210/trace.h
@@ -70,13 +70,10 @@ DECLARE_EVENT_CLASS(wil6210_log_event,
 	TP_PROTO(struct va_format *vaf),
 	TP_ARGS(vaf),
 	TP_STRUCT__entry(
-		__dynamic_array(char, msg, WIL6210_MSG_MAX)
+		__vstring(msg, vaf->fmt, vaf->va)
 	),
 	TP_fast_assign(
-		WARN_ON_ONCE(vsnprintf(__get_dynamic_array(msg),
-				       WIL6210_MSG_MAX,
-				       vaf->fmt,
-				       *vaf->va) >= WIL6210_MSG_MAX);
+		__assign_vstr(msg, vaf->fmt, vaf->va);
 	),
 	TP_printk("%s", __get_str(msg))
 );