[PATCH AUTOSEL 5.4 011/134] tools/power/x86/intel-speed-select: Remove warning for unused result

Sasha Levin
2019-12-11T16:10:01Z

From: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>

[ Upstream commit abd120e3bdf3dd72ba1ed9ac077a861e0e3dc43a ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 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);
}
--
2.20.1