Bluetooth regression in 3.10

["Michael Büsch" <m@bues.ch>]

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Hi Johan,

I noticed the thread "3.10-rc: bluetooth disappeared on thinkpad x60 (regression)"
on lkml, but unfortunately the resulting patch does not fix the regression
for me.
I'm running 3.10.10, so the fix from the thread is applied to my kernel.

I see similar issues when trying to bring up my Bluetooth dongle:

$ lsusb | grep Blue
Bus 004 Device 002: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)

This is a Broadcom chip based device.

$ hciconfig hci0 up                                            
Can't init device hci0: Operation not supported (95)

hcidump hci0 -X shows:

< HCI Command: Delete Stored Link Key (0x03|0x0012) plen 7
    bdaddr 00:00:00:00:00:00 all 1
> HCI Event: Command Complete (0x0e) plen 4
    Delete Stored Link Key (0x03|0x0012) ncmd 1
    status 0x11 deleted 0
    Error: Unsupported Feature or Parameter Value
device: disconnected


The following workaround fixes the problem for me:

Index: linux/net/bluetooth/hci_core.c
===================================================================
--- linux.orig/net/bluetooth/hci_core.c	2013-07-21 17:34:22.749435335 +0200
+++ linux/net/bluetooth/hci_core.c	2013-09-04 15:39:07.580170034 +0200
@@ -598,7 +598,7 @@
 	u8 p;
 
 	/* Only send HCI_Delete_Stored_Link_Key if it is supported */
-	if (hdev->commands[6] & 0x80) {
+	if (0) {
 		struct hci_cp_delete_stored_link_key cp;
 
 		bacpy(&cp.bdaddr, BDADDR_ANY);


This isn't a real solution, of course.
I would be happy to test alternative solutions.

-- 
Michael

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