From a9f0290a6754a475eb95818dd38dc401370da071 Mon Sep 17 00:00:00 2001
From: liuchao173 <55137861+liuchao173@users.noreply.github.com>
Date: Mon, 23 Aug 2021 19:40:41 +0800
Subject: [PATCH] fix opendir fails in check_platform_device

When irq name does not contain spaces, savedptr is an empty string and irq_fullname will have a extra space at the end like "
LNRO0005:00 ".
So opendir in check_platform_device will fail, and irqbalance prints log:
"No directory /sys/devices/platform/LNRO0005:00 /: No such file or directory"
---
 procinterrupts.c | 25 +++++++++++--------------
 1 file changed, 11 insertions(+), 14 deletions(-)

diff --git a/procinterrupts.c b/procinterrupts.c
index 32c5e53..2bd201b 100644
--- a/procinterrupts.c
+++ b/procinterrupts.c
@@ -183,20 +183,17 @@ void init_irq_class_and_type(char *savedline, struct irq_info *info, int irq)
 	}
 
 #ifdef AARCH64
-		irq_name = last_token;
-		tmp = strchr(irq_name, '\n');
-		if (tmp)
-			*tmp = 0;
-
-	if (strlen(irq_name) + strlen(savedptr) + 1 < PATH_MAX) {
-		strcat(irq_fullname, irq_name);
-		strcat(irq_fullname, " ");
-		strcat(irq_fullname, savedptr);
-		tmp = strchr(irq_fullname, '\n');
-		if (tmp)
-			*tmp = 0;
-	} else {
-	irq_fullname_valid = 0;
+	if (strlen(savedptr) > 0) {
+		if (strlen(irq_name) + strlen(savedptr) + 1 < PATH_MAX) {
+			strcat(irq_fullname, irq_name);
+			strcat(irq_fullname, " ");
+			strcat(irq_fullname, savedptr);
+			tmp = strchr(irq_fullname, '\n');
+			if (tmp)
+				*tmp = 0;
+		} else {
+			irq_fullname_valid = 0;
+		}
 	}
 #endif
 	irq_mod = last_token;
-- 
1.8.3.1