[Devel] [PATCH] bluetooth hidp: Convert to kthread API.

[Eric W. Biederman]

From: Eric W. Biederman <ebiederm at xmission.com> - unquoted

This patch starts up khidp using kthread_run instead
of kernel_thread and daemonize, resulting is slightly
simpler and more maintainable code.

Cc: Marcel Holtmann <marcel at holtmann.org>
Signed-off-by: Eric W. Biederman <ebiederm at xmission.com>
---
 net/bluetooth/hidp/core.c |   29 ++++++++++++++++-------------
 1 files changed, 16 insertions(+), 13 deletions(-)

diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c
index df2c471..1c9b202 100644
--- a/net/bluetooth/hidp/core.c
+++ b/net/bluetooth/hidp/core.c
@@ -36,6 +36,7 @@
 #include <linux/init.h>
 #include <linux/wait.h>
 #include <linux/freezer.h>
+#include <linux/kthread.h>
 #include <net/sock.h>
 
 #include <linux/input.h>
@@ -531,22 +532,11 @@ static int hidp_session(void *arg)
 	struct sock *ctrl_sk = session->ctrl_sock->sk;
 	struct sock *intr_sk = session->intr_sock->sk;
 	struct sk_buff *skb;
-	int vendor = 0x0000, product = 0x0000;
 	wait_queue_t ctrl_wait, intr_wait;
 
 	BT_DBG("session %p", session);
 
-	if (session->input) {
-		vendor  = session->input->id.vendor;
-		product = session->input->id.product;
-	}
-
-	if (session->hid) {
-		vendor  = session->hid->vendor;
-		product = session->hid->product;
-	}
 
-	daemonize("khidpd_%04x%04x", vendor, product);
 	set_user_nice(current, -15);
 
 	init_waitqueue_entry(&ctrl_wait, current);
@@ -747,7 +737,9 @@ static inline void hidp_setup_hid(struct hidp_session *session, struct hidp_conn
 
 int hidp_add_connection(struct hidp_connadd_req *req, struct socket *ctrl_sock, struct socket *intr_sock)
 {
+	int vendor = 0x0000, product = 0x0000;
 	struct hidp_session *session, *s;
+	struct task_struct *task;
 	int err;
 
 	BT_DBG("");
@@ -834,8 +826,19 @@ int hidp_add_connection(struct hidp_connadd_req *req, struct socket *ctrl_sock,
 
 	hidp_set_timer(session);
 
-	err = kernel_thread(hidp_session, session, CLONE_KERNEL);
-	if (err < 0)
+	if (session->input) {
+		vendor  = session->input->id.vendor;
+		product = session->input->id.product;
+	}
+
+	if (session->hid) {
+		vendor  = session->hid->vendor;
+		product = session->hid->product;
+	}
+	task = kthread_run(hidp_session, session,
+			   "khidpd_%04x%04x", vendor, product);
+	err = PTR_ERR(task);
+	if (IS_ERR(task))
 		goto unlink;
 
 	if (session->input) {
-- 
1.5.0.g53756

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