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

Reference: https://github.com/Irqbalance/irqbalance/commit/a9f0290a6754a475eb95818dd38dc401370da071
Conflict: NA

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 | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/procinterrupts.c b/procinterrupts.c
index e372671..9015177 100644
--- a/procinterrupts.c
+++ b/procinterrupts.c
@@ -178,10 +178,12 @@ void init_irq_class_and_type(char *savedline, struct irq_info *info, int irq)
 	}
 
 #ifdef AARCH64
-	snprintf(irq_fullname, PATH_MAX, "%s %s", last_token, savedptr);
-	tmp = strchr(irq_fullname, '\n');
-	if (tmp)
-		*tmp = 0;
+	if (strlen(savedptr) > 0) {
+		snprintf(irq_fullname, PATH_MAX, "%s %s", last_token, savedptr);
+		tmp = strchr(irq_fullname, '\n');
+		if (tmp)
+			*tmp = 0;
+	}
 #else
 	snprintf(irq_fullname, PATH_MAX, "%s", last_token);
 #endif
-- 
2.33.0