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

[Srinivas Pandruvada]

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.pandruv...@linux.intel.com>
---
 tools/power/x86/intel-speed-select/isst-config.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/tools/power/x86/intel-speed-select/isst-config.c 
b/tools/power/x86/intel-speed-select/isst-config.c
index 2a9890c8395a..21fcfe621d3a 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);
 }
-- 
2.17.2