linux-kernel - [PATCH] Bluetooth: Fix HCI_RESET command synchronization backported to stable

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Message-Id: <1302623007-16402-1-git-send-email-justinmattock@gmail.com>
Date:	Tue, 12 Apr 2011 08:43:27 -0700
From:	"Justin P. Mattock" <justinmattock@...il.com>
To:	stable@...nel.org
Cc:	linux-kernel@...r.kernel.org, greg@...ah.com,
	"Gustavo F. Padovan" <padovan@...fusion.mobi>
Subject: [PATCH] Bluetooth: Fix HCI_RESET command synchronization backported to stable

backported to stable. did not have the time to compile test this, but patch applies.

Reported-by: Mikko Vinni <mmvinni@...oo.com>
Reported-by: Justin P. Mattock <justinmattock@...il.com>
Reported-by: Ed Tomlinson <edt@....ca>
Signed-off-by: Gustavo F. Padovan <padovan@...fusion.mobi>
Tested-by: Justin P. Mattock <justinmattock@...il.com>
Tested-by: Mikko Vinni <mmvinni@...oo.com>
Tested-by: Ed Tomlinson <edt@....ca>


diff -Naur linux-2.6.38.2-orig/include/net/bluetooth/hci.h linux-2.6.38.2/include/net/bluetooth/hci.h
--- linux-2.6.38.2-orig/include/net/bluetooth/hci.h	2011-03-27 11:37:20.000000000 -0700
+++ linux-2.6.38.2/include/net/bluetooth/hci.h	2011-04-12 08:27:55.905603867 -0700
@@ -74,6 +74,7 @@
 	HCI_AUTH,
 	HCI_ENCRYPT,
 	HCI_INQUIRY,
+	HCI_RESET,
 
 	HCI_RAW,
 };
diff -Naur linux-2.6.38.2-orig/net/bluetooth/hci_core.c linux-2.6.38.2/net/bluetooth/hci_core.c
--- linux-2.6.38.2-orig/net/bluetooth/hci_core.c	2011-03-27 11:37:20.000000000 -0700
+++ linux-2.6.38.2/net/bluetooth/hci_core.c	2011-04-12 08:29:40.178300280 -0700
@@ -184,6 +184,7 @@
 	BT_DBG("%s %ld", hdev->name, opt);
 
 	/* Reset device */
+	set_bit(HCI_RESET, &hdev->flags);
 	hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
 }
 
@@ -210,7 +211,8 @@
 	/* Mandatory initialization */
 
 	/* Reset */
-	if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks))
+	if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) {
+                        set_bit(HCI_RESET, &hdev->flags);
 			hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
 
 	/* Read Local Supported Features */
diff -Naur linux-2.6.38.2-orig/net/bluetooth/hci_event.c linux-2.6.38.2/net/bluetooth/hci_event.c
--- linux-2.6.38.2-orig/net/bluetooth/hci_event.c	2011-03-27 11:37:20.000000000 -0700
+++ linux-2.6.38.2/net/bluetooth/hci_event.c	2011-04-12 08:30:54.816367176 -0700
@@ -183,6 +183,8 @@
 
 	BT_DBG("%s status 0x%x", hdev->name, status);
 
+	clear_bit(HCI_RESET, &hdev->flags);
+
 	hci_req_complete(hdev, HCI_OP_RESET, status);
 }
 
@@ -1398,7 +1400,7 @@
 		break;
 	}
 
-	if (ev->ncmd) {
+	if (ev->ncmd && !test_bit(HCI_RESET, &hdev->flags)) {
 		atomic_set(&hdev->cmd_cnt, 1);
 		if (!skb_queue_empty(&hdev->cmd_q))
 			tasklet_schedule(&hdev->cmd_task);
--
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