[for-next][PATCH 1/7] ftrace: Clean up __seq_open_private() return check

[Steven Rostedt]

From: "Steven Rostedt (VMware)" <rost...@goodmis.org>

The return status check of __seq_open_private() is rather strange:

        iter = __seq_open_private();
        if (iter) {
                /* do stuff */
        }

        return iter ? 0 : -ENOMEM;

It makes much more sense to do the return of failure right away:

        iter = __seq_open_private();
        if (!iter)
                return -ENOMEM;

        /* do stuff */

        return 0;

This clean up will make updates to this code a bit nicer.

Signed-off-by: Steven Rostedt (VMware) <rost...@goodmis.org>
---
 kernel/trace/ftrace.c | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 0556a202c055..527c4d3e8d7f 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -3355,12 +3355,13 @@ ftrace_avail_open(struct inode *inode, struct file 
*file)
                return -ENODEV;
 
        iter = __seq_open_private(file, &show_ftrace_seq_ops, sizeof(*iter));
-       if (iter) {
-               iter->pg = ftrace_pages_start;
-               iter->ops = &global_ops;
-       }
+       if (!iter)
+               return -ENOMEM;
 
-       return iter ? 0 : -ENOMEM;
+       iter->pg = ftrace_pages_start;
+       iter->ops = &global_ops;
+
+       return 0;
 }
 
 static int
@@ -3369,13 +3370,14 @@ ftrace_enabled_open(struct inode *inode, struct file 
*file)
        struct ftrace_iterator *iter;
 
        iter = __seq_open_private(file, &show_ftrace_seq_ops, sizeof(*iter));
-       if (iter) {
-               iter->pg = ftrace_pages_start;
-               iter->flags = FTRACE_ITER_ENABLED;
-               iter->ops = &global_ops;
-       }
+       if (!iter)
+               return -ENOMEM;
 
-       return iter ? 0 : -ENOMEM;
+       iter->pg = ftrace_pages_start;
+       iter->flags = FTRACE_ITER_ENABLED;
+       iter->ops = &global_ops;
+
+       return 0;
 }
 
 /**
-- 
2.10.2