linux-kernel - [PATCH] bluetooth: hidp_process_hid_control remove unnecessary parameter dealing

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Date:	Wed, 24 Oct 2007 11:14:19 +0800
From:	Dave Young <hidave.darkstar@...il.com>
To:	Marcel Holtmann <marcel@...tmann.org>
Cc:	bluez-devel@...ts.sourceforge.net,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] bluetooth: hidp_process_hid_control remove unnecessary parameter dealing

According to the bluetooth HID spec v1.0 chapter 7.4.2

"This code requests a major state change in a BT-HID device. A HID_CONTROL request does not generate a HANDSHAKE response."

"A HID_CONTROL packet with a parameter of VIRTUAL_CABLE_UNPLUG is the only HID_CONTROL packet a device can send to a host. A host will ignore all other packets."

So in the hidp_precess_hid_control function, we just need to deal with the UNLUG packet.

Signed-off-by: Dave Young <hidave.darkstar@...il.com> 

---
net/bluetooth/hidp/core.c |   19 +------------------
1 file changed, 1 insertion(+), 18 deletions(-)

diff -upr linux/net/bluetooth/hidp/core.c linux.new/net/bluetooth/hidp/core.c
--- linux/net/bluetooth/hidp/core.c	2007-10-15 14:05:23.000000000 +0800
+++ linux.new/net/bluetooth/hidp/core.c	2007-10-24 11:01:07.000000000 +0800
@@ -369,30 +369,13 @@ static inline void hidp_process_hid_cont
 {
 	BT_DBG("session %p param 0x%02x", session, param);
 
-	switch (param) {
-	case HIDP_CTRL_NOP:
-		break;
-
-	case HIDP_CTRL_VIRTUAL_CABLE_UNPLUG:
+	if (param == HIDP_CTRL_VIRTUAL_CABLE_UNPLUG) {
 		/* Flush the transmit queues */
 		skb_queue_purge(&session->ctrl_transmit);
 		skb_queue_purge(&session->intr_transmit);
 
 		/* Kill session thread */
 		atomic_inc(&session->terminate);
-		break;
-
-	case HIDP_CTRL_HARD_RESET:
-	case HIDP_CTRL_SOFT_RESET:
-	case HIDP_CTRL_SUSPEND:
-	case HIDP_CTRL_EXIT_SUSPEND:
-		/* FIXME: We have to parse these and return no error */
-		break;
-
-	default:
-		__hidp_send_ctrl_message(session,
-			HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0);
-		break;
 	}
 }
 
-
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