From: Wang Hui <john.wang...@huawei.com>
If no monitoring feature is detected because all monitoring features are
disabled during boot time or there is no monitoring feature in hardware,
creating rdtgroup sub-directory by "mkdir" command reports error:
#mkdir /sys/fs/resctrl/p1
mkdir: cannot create directory ‘/sys/fs/resctrl/p1’: No such file or
directory
But the sub-directory actually is generated and content is correct:
#ls /sys/fs/resctrl/p1
cpus cpus_list schemata tasks
The error is because rdtgroup_mkdir_ctrl_mon() returns non zero value after
the sub-directory is created and the returned value is reported as an error
to user.
Clear the returned value to report to user that the sub-directory is
actually created successfully.
Signed-off-by: Wang Hui <john.wang...@huawei.com>
Signed-off-by: Zhang Yanfei <yanfei.zh...@huawei.com>
Signed-off-by: Fenghua Yu <fenghua...@intel.com>
---
arch/x86/kernel/cpu/intel_rdt_rdtgroup.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
index bdab7d2f51af..fca759d272a1 100644
--- a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
+++ b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
@@ -1804,6 +1804,7 @@ static int rdtgroup_mkdir_ctrl_mon(struct kernfs_node
*parent_kn,
goto out_common_fail;
}
closid = ret;
+ ret = 0;
rdtgrp->closid = closid;
list_add(&rdtgrp->rdtgroup_list, &rdt_all_groups);
--
2.5.0
