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authorJonathan Corbet <corbet@lwn.net>2009-02-01 14:52:56 -0700
committerJonathan Corbet <corbet@lwn.net>2009-03-16 08:34:35 -0600
commit60aa49243d09afc873f082567d2e3c16634ced84 (patch)
treebb7c8d9668b35a3aa4e90d0a62500ac9d3e67f7f /fs/pipe.c
parent76398425bb06b07cc3a3b1ce169c67dc9d6874ed (diff)
Rationalize fasync return values
Most fasync implementations do something like: return fasync_helper(...); But fasync_helper() will return a positive value at times - a feature used in at least one place. Thus, a number of other drivers do: err = fasync_helper(...); if (err < 0) return err; return 0; In the interests of consistency and more concise code, it makes sense to map positive return values onto zero where ->fasync() is called. Cc: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'fs/pipe.c')
-rw-r--r--fs/pipe.c16
1 files changed, 3 insertions, 13 deletions
diff --git a/fs/pipe.c b/fs/pipe.c
index 14f502b89cf..94ad15967cf 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -667,10 +667,7 @@ pipe_read_fasync(int fd, struct file *filp, int on)
retval = fasync_helper(fd, filp, on, &inode->i_pipe->fasync_readers);
mutex_unlock(&inode->i_mutex);
- if (retval < 0)
- return retval;
-
- return 0;
+ return retval;
}
@@ -684,10 +681,7 @@ pipe_write_fasync(int fd, struct file *filp, int on)
retval = fasync_helper(fd, filp, on, &inode->i_pipe->fasync_writers);
mutex_unlock(&inode->i_mutex);
- if (retval < 0)
- return retval;
-
- return 0;
+ return retval;
}
@@ -706,11 +700,7 @@ pipe_rdwr_fasync(int fd, struct file *filp, int on)
fasync_helper(-1, filp, 0, &pipe->fasync_readers);
}
mutex_unlock(&inode->i_mutex);
-
- if (retval < 0)
- return retval;
-
- return 0;
+ return retval;
}