diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
index a5fd407213b6..07a99e638449 100644
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -35,7 +35,7 @@ int64_t opal_console_read(int64_t term_number, __be64 *length,
 			  uint8_t *buffer);
 int64_t opal_console_write_buffer_space(int64_t term_number,
 					__be64 *length);
-void opal_console_flush(void);
+int64_t opal_console_flush(int64_t term_number);
 int64_t opal_rtc_read(__be32 *year_month_day,
 		      __be64 *hour_minute_second_millisecond);
 int64_t opal_rtc_write(uint32_t year_month_day,
diff --git a/arch/powerpc/platforms/powernv/opal-kmsg.c b/arch/powerpc/platforms/powernv/opal-kmsg.c
index bd3b2ee1ba1d..6f1214d4de92 100644
--- a/arch/powerpc/platforms/powernv/opal-kmsg.c
+++ b/arch/powerpc/platforms/powernv/opal-kmsg.c
@@ -27,6 +27,7 @@ static void force_opal_console_flush(struct kmsg_dumper *dumper,
 				     enum kmsg_dump_reason reason)
 {
 	int i;
+	int64_t ret;
 
 	/*
 	 * Outside of a panic context the pollers will continue to run,
@@ -36,7 +37,13 @@ static void force_opal_console_flush(struct kmsg_dumper *dumper,
 		return;
 
 	if (opal_check_token(OPAL_CONSOLE_FLUSH)) {
-		opal_console_flush();
+		ret = opal_console_flush(0);
+
+		if (ret == OPAL_UNSUPPORTED || ret == OPAL_PARAMETER)
+			return;
+
+		/* Incrementally flush until there's nothing left */
+		while (opal_console_flush(0) != OPAL_SUCCESS);
 	} else {
 		/*
 		 * If OPAL_CONSOLE_FLUSH is not implemented in the firmware,