From: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Date: Thu, 10 Oct 2019 20:29:36 +0000 (-0700)
Subject: tools/power/x86/intel-speed-select: Remove warning for unused result
X-Git-Tag: v5.5-rc1~91^2~36
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=abd120e3bdf3dd72ba1ed9ac077a861e0e3dc43a;p=thirdparty%2Fkernel%2Flinux.git

tools/power/x86/intel-speed-select: Remove warning for unused result

Fix warning for:
isst-config.c: In function ‘set_cpu_online_offline’:
isst-config.c:221:3: warning: ignoring return value of ‘write’,
declared with attribute warn_unused_result [-Wunused-result]
   write(fd, "1\n", 2);

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---

diff --git a/tools/power/x86/intel-speed-select/isst-config.c b/tools/power/x86/intel-speed-select/isst-config.c
index 2a9890c8395a4..21fcfe621d3aa 100644
--- a/tools/power/x86/intel-speed-select/isst-config.c
+++ b/tools/power/x86/intel-speed-select/isst-config.c
@@ -169,7 +169,7 @@ int get_topo_max_cpus(void)
 static void set_cpu_online_offline(int cpu, int state)
 {
 	char buffer[128];
-	int fd;
+	int fd, ret;
 
 	snprintf(buffer, sizeof(buffer),
 		 "/sys/devices/system/cpu/cpu%d/online", cpu);
@@ -179,9 +179,12 @@ static void set_cpu_online_offline(int cpu, int state)
 		err(-1, "%s open failed", buffer);
 
 	if (state)
-		write(fd, "1\n", 2);
+		ret = write(fd, "1\n", 2);
 	else
-		write(fd, "0\n", 2);
+		ret = write(fd, "0\n", 2);
+
+	if (ret == -1)
+		perror("Online/Offline: Operation failed\n");
 
 	close(fd);
 }