connector: make callback argument type explicit
The connector documentation states that the argument to the callback
function is always a pointer to a struct cn_msg, but rather than encode it
in the API itself, it uses a void pointer everywhere. This doesn't make
much sense to encode the pointer in documentation as it prevents proper C
type checking from occurring and can easily allow people to use the wrong
pointer type. So convert the argument type to an explicit struct cn_msg
pointer.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/Documentation/connector/cn_test.c b/Documentation/connector/cn_test.c
index f688eba..50d5ce4 100644
--- a/Documentation/connector/cn_test.c
+++ b/Documentation/connector/cn_test.c
@@ -32,10 +32,8 @@
static struct sock *nls;
static struct timer_list cn_test_timer;
-void cn_test_callback(void *data)
+void cn_test_callback(struct cn_msg *msg)
{
- struct cn_msg *msg = (struct cn_msg *)data;
-
printk("%s: %lu: idx=%x, val=%x, seq=%u, ack=%u, len=%d: %s.\n",
__func__, jiffies, msg->id.idx, msg->id.val,
msg->seq, msg->ack, msg->len, (char *)msg->data);
diff --git a/drivers/connector/cn_proc.c b/drivers/connector/cn_proc.c
index c5afc98..85e5dc0 100644
--- a/drivers/connector/cn_proc.c
+++ b/drivers/connector/cn_proc.c
@@ -202,9 +202,8 @@
* cn_proc_mcast_ctl
* @data: message sent from userspace via the connector
*/
-static void cn_proc_mcast_ctl(void *data)
+static void cn_proc_mcast_ctl(struct cn_msg *msg)
{
- struct cn_msg *msg = data;
enum proc_cn_mcast_op *mc_op = NULL;
int err = 0;
diff --git a/drivers/connector/cn_queue.c b/drivers/connector/cn_queue.c
index c769ef2..d478aef 100644
--- a/drivers/connector/cn_queue.c
+++ b/drivers/connector/cn_queue.c
@@ -87,7 +87,9 @@
kfree(d->free);
}
-static struct cn_callback_entry *cn_queue_alloc_callback_entry(char *name, struct cb_id *id, void (*callback)(void *))
+static struct cn_callback_entry *
+cn_queue_alloc_callback_entry(char *name, struct cb_id *id,
+ void (*callback)(struct cn_msg *))
{
struct cn_callback_entry *cbq;
@@ -120,7 +122,8 @@
return ((i1->idx == i2->idx) && (i1->val == i2->val));
}
-int cn_queue_add_callback(struct cn_queue_dev *dev, char *name, struct cb_id *id, void (*callback)(void *))
+int cn_queue_add_callback(struct cn_queue_dev *dev, char *name, struct cb_id *id,
+ void (*callback)(struct cn_msg *))
{
struct cn_callback_entry *cbq, *__cbq;
int found = 0;
diff --git a/drivers/connector/connector.c b/drivers/connector/connector.c
index fd336c5..3f45669 100644
--- a/drivers/connector/connector.c
+++ b/drivers/connector/connector.c
@@ -269,7 +269,8 @@
*
* May sleep.
*/
-int cn_add_callback(struct cb_id *id, char *name, void (*callback)(void *))
+int cn_add_callback(struct cb_id *id, char *name,
+ void (*callback)(struct cn_msg *))
{
int err;
struct cn_dev *dev = &cdev;
@@ -351,9 +352,8 @@
*
* Used for notification of a request's processing.
*/
-static void cn_callback(void *data)
+static void cn_callback(struct cn_msg *msg)
{
- struct cn_msg *msg = data;
struct cn_ctl_msg *ctl;
struct cn_ctl_entry *ent;
u32 size;
diff --git a/drivers/staging/dst/dcore.c b/drivers/staging/dst/dcore.c
index fad25b7..8472418 100644
--- a/drivers/staging/dst/dcore.c
+++ b/drivers/staging/dst/dcore.c
@@ -846,10 +846,9 @@
/*
* Configuration parser.
*/
-static void cn_dst_callback(void *data)
+static void cn_dst_callback(struct cn_msg *msg)
{
struct dst_ctl *ctl;
- struct cn_msg *msg = data;
int err;
struct dst_ctl_ack ack;
struct dst_node *n = NULL, *tmp;
diff --git a/drivers/video/uvesafb.c b/drivers/video/uvesafb.c
index ca5b464..e98baf6 100644
--- a/drivers/video/uvesafb.c
+++ b/drivers/video/uvesafb.c
@@ -67,9 +67,8 @@
* find the kernel part of the task struct, copy the registers and
* the buffer contents and then complete the task.
*/
-static void uvesafb_cn_callback(void *data)
+static void uvesafb_cn_callback(struct cn_msg *msg)
{
- struct cn_msg *msg = data;
struct uvesafb_task *utask;
struct uvesafb_ktask *task;
diff --git a/drivers/w1/w1_netlink.c b/drivers/w1/w1_netlink.c
index fdf7285..52ccb3d 100644
--- a/drivers/w1/w1_netlink.c
+++ b/drivers/w1/w1_netlink.c
@@ -306,9 +306,8 @@
return error;
}
-static void w1_cn_callback(void *data)
+static void w1_cn_callback(struct cn_msg *msg)
{
- struct cn_msg *msg = data;
struct w1_netlink_msg *m = (struct w1_netlink_msg *)(msg + 1);
struct w1_netlink_cmd *cmd;
struct w1_slave *sl;
diff --git a/include/linux/connector.h b/include/linux/connector.h
index b68d278..47ebf41 100644
--- a/include/linux/connector.h
+++ b/include/linux/connector.h
@@ -136,7 +136,7 @@
void *ddata;
void *callback_priv;
- void (*callback) (void *);
+ void (*callback) (struct cn_msg *);
void *free;
};
@@ -167,11 +167,11 @@
struct cn_queue_dev *cbdev;
};
-int cn_add_callback(struct cb_id *, char *, void (*callback) (void *));
+int cn_add_callback(struct cb_id *, char *, void (*callback) (struct cn_msg *));
void cn_del_callback(struct cb_id *);
int cn_netlink_send(struct cn_msg *, u32, gfp_t);
-int cn_queue_add_callback(struct cn_queue_dev *dev, char *name, struct cb_id *id, void (*callback)(void *));
+int cn_queue_add_callback(struct cn_queue_dev *dev, char *name, struct cb_id *id, void (*callback)(struct cn_msg *));
void cn_queue_del_callback(struct cn_queue_dev *dev, struct cb_id *id);
int queue_cn_work(struct cn_callback_entry *cbq, struct work_struct *work);