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>
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index ed8baa0..7a7a026 100644
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -94,11 +94,8 @@
static int evdev_fasync(int fd, struct file *file, int on)
{
struct evdev_client *client = file->private_data;
- int retval;
- retval = fasync_helper(fd, file, on, &client->fasync);
-
- return retval < 0 ? retval : 0;
+ return fasync_helper(fd, file, on, &client->fasync);
}
static int evdev_flush(struct file *file, fl_owner_t id)
diff --git a/drivers/input/joydev.c b/drivers/input/joydev.c
index 6f23662..4224f01 100644
--- a/drivers/input/joydev.c
+++ b/drivers/input/joydev.c
@@ -159,12 +159,9 @@
static int joydev_fasync(int fd, struct file *file, int on)
{
- int retval;
struct joydev_client *client = file->private_data;
- retval = fasync_helper(fd, file, on, &client->fasync);
-
- return retval < 0 ? retval : 0;
+ return fasync_helper(fd, file, on, &client->fasync);
}
static void joydev_free(struct device *dev)
diff --git a/drivers/input/mousedev.c b/drivers/input/mousedev.c
index ef99a7e..17fd6d4 100644
--- a/drivers/input/mousedev.c
+++ b/drivers/input/mousedev.c
@@ -403,12 +403,9 @@
static int mousedev_fasync(int fd, struct file *file, int on)
{
- int retval;
struct mousedev_client *client = file->private_data;
- retval = fasync_helper(fd, file, on, &client->fasync);
-
- return retval < 0 ? retval : 0;
+ return fasync_helper(fd, file, on, &client->fasync);
}
static void mousedev_free(struct device *dev)
diff --git a/drivers/input/serio/serio_raw.c b/drivers/input/serio/serio_raw.c
index 06bbd0e..b03009b 100644
--- a/drivers/input/serio/serio_raw.c
+++ b/drivers/input/serio/serio_raw.c
@@ -58,10 +58,8 @@
static int serio_raw_fasync(int fd, struct file *file, int on)
{
struct serio_raw_list *list = file->private_data;
- int retval;
- retval = fasync_helper(fd, file, on, &list->fasync);
- return retval < 0 ? retval : 0;
+ return fasync_helper(fd, file, on, &list->fasync);
}
static struct serio_raw *serio_raw_locate(int minor)
