[Bug 60824] [PATCH][regression] Cambridge Silicon Radio, Ltd Bluetooth Dongle unusable

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https://bugzilla.kernel.org/show_bug.cgi?id=60824

Lucas Rizzini (lucasrizzini@xxxxxxxxxxx) changed:

           What    |Removed                     |Added
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                 CC|                            |lucasrizzini@xxxxxxxxxxx

--- Comment #184 from Lucas Rizzini (lucasrizzini@xxxxxxxxxxx) ---
(In reply to Mauro Fontana from comment #67)
> Created attachment 289017 [details]
> lsusb for bcdDevice 25.20
> 
> Okay, managed to compiled the module with the fixups option and loaded.
> Unfortunately, although the module loads without problems, the BT adapter
> won't work.
> 
> hciconfig hci0 up 
> 
> ends in connection timed out.
> 
> I attach the full lsusb -v output for this device. Is there any other
> helpful info I can provide? Being able to solve this would be great, as in
> my country all the BT dongles I've seen online are CSR dongles.

Same here. I managed to compile the module on kernel 5.4.6 with the patch that
has the fixups made by Fernando Carvalho, but the symptoms are the same as
without it; no bluetooth adapter found with bluetoothctl or any other front
end. 

Dmesg shows the patch and the fixups are indeed applied.

lsusb -v -> https://pastebin.com/HDc9z10e

/etc/modprobe.d/csr-bluetoothbongle.conf:
<code>options btusb fixups=0x0800000:0x000004:0x0a12:0x0001:0x8891</code>

dmesg:
<code>
[ 2080.767176] usbcore: registered new interface driver btusb
[ 2086.045608] usb 2-4: new full-speed USB device number 11 using xhci_hcd
[ 2086.187920] usb 2-4: config 1 interface 1 altsetting 0 endpoint 0x3 has
wMaxPacketSize 0, skipping
[ 2086.187922] usb 2-4: config 1 interface 1 altsetting 0 endpoint 0x83 has
wMaxPacketSize 0, skipping
[ 2086.188519] usb 2-4: New USB device found, idVendor=0a12, idProduct=0001,
bcdDevice=88.91
[ 2086.188520] usb 2-4: New USB device strings: Mfr=0, Product=2,
SerialNumber=0
[ 2086.188522] usb 2-4: Product: BT DONGLE10
[ 2086.190717] btusb: New fixups. Device: 0x0a12:0x0001/0x8891. Rule 1/1 (5
terms): 0x0a12:0x0001/0x8891
[ 2086.190718] btusb: driver flags: initial => 0x0000000000000004
[ 2086.190719] btusb: driver flags: masked  => 0x0000000000800000</code>

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