brcmfmac: switch to C function (__brcmf_err) for printing errors

This will allow extending code and using more detailed messages e.g.
with the help of dev_err.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c

@@ -218,6 +218,22 @@ done:
 	return err;
 }
 
+#ifndef CONFIG_BRCM_TRACING
+void __brcmf_err(const char *func, const char *fmt, ...)
+{
+	struct va_format vaf;
+	va_list args;
+
+	va_start(args, fmt);
+
+	vaf.fmt = fmt;
+	vaf.va = &args;
+	pr_err("%s: %pV", func, &vaf);
+
+	va_end(args);
+}
+#endif
+
 #if defined(CONFIG_BRCM_TRACING) || defined(CONFIG_BRCMDBG)
 void __brcmf_dbg(u32 level, const char *func, const char *fmt, ...)
 {

drivers/net/wireless/broadcom/brcm80211/brcmfmac/debug.h

@@ -45,6 +45,8 @@
 #undef pr_fmt
 #define pr_fmt(fmt)		KBUILD_MODNAME ": " fmt
 
+__printf(2, 3)
+void __brcmf_err(const char *func, const char *fmt, ...);
 #ifndef CONFIG_BRCM_TRACING
 /* Macro for error messages. net_ratelimit() is used when driver
  * debugging is not selected. When debugging the driver error
@@ -53,11 +55,9 @@
 #define brcmf_err(fmt, ...)						\
 	do {								\
 		if (IS_ENABLED(CONFIG_BRCMDBG) || net_ratelimit())	\
-			pr_err("%s: " fmt, __func__, ##__VA_ARGS__);	\
+			__brcmf_err(__func__, fmt, ##__VA_ARGS__);	\
 	} while (0)
 #else
-__printf(2, 3)
-void __brcmf_err(const char *func, const char *fmt, ...);
 #define brcmf_err(fmt, ...) \
 	__brcmf_err(__func__, fmt, ##__VA_ARGS__)
 #endif