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tracing: Fix tracing_stat return values in error handling paths 

tracing_stat_init() was always returning '0', even on the error paths.  It
now returns -ENODEV if tracing_init_dentry() fails or -ENOMEM if it fails
to created the 'trace_stat' debugfs directory.

Link: http://lkml.kernel.org/r/1410299381-20108-1-git-send-email-luis.henriques@canonical.com

Fixes: ed6f1c996b ("tracing: Check return value of tracing_init_dentry()")
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
[ Pulled from the archeological digging of my INBOX ]
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
alistair/sensors
Luis Henriques 2014-09-09 22:49:41 +01:00 committed by Steven Rostedt (VMware)
parent dfb6cd1e65
commit afccc00f75
1 changed files with 8 additions and 4 deletions
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12
kernel/trace/trace_stat.c
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@ -280,18 +280,22 @@ static int tracing_stat_init(void)
d_tracing = tracing_init_dentry();
if (IS_ERR(d_tracing))
return 0;
return -ENODEV;
stat_dir = tracefs_create_dir("trace_stat", d_tracing);
if (!stat_dir)
if (!stat_dir) {
pr_warn("Could not create tracefs 'trace_stat' entry\n");
return -ENOMEM;
}
return 0;
}
static int init_stat_file(struct stat_session *session)
{
if (!stat_dir && tracing_stat_init())
return -ENODEV;
int ret;
if (!stat_dir && (ret = tracing_stat_init()))
return ret;
session->file = tracefs_create_file(session->ts->name, 0644,
stat_dir,