Re: build issues with rtl8723au_bt

[Bhuvanchandra <bhuvanchandradv@gmail.com>]

On 09/08/2015 02:58 AM, Larry Finger wrote:

> On 09/07/2015 07:20 AM, Bhuvanchandra wrote:
>> Hi!
>>
>> I'm testing RTL8723BU(available in LM811. USB ID 0bda:b720) WiFi BT 
>> USB module.
>> Kernel version used: 4.1.5. Cross-compiled the Wifi Driver from[1] it 
>> worked fine.
>> While crosscompiling the driver for BT which is available at[2], 
>> there are few
>> compile time errors:
>> ....
>> make ARCH=arm 
>> CROSS_COMPILE=/home/dvb/gcc-linaro/bin/arm-linux-gnueabihf- -C
>> /home/dvb/linux-toradex M=/home/dvb/rtl8723au_bt modules
>> make[1]: Entering directory
>> '/home/dvb/toradex/linux-toradex/linux-toradex-vf/linux-toradex'
>>    CC [M]  /home/dvb/rtl8723au_bt/btusb.o
>> /home/dvb/rtl8723au_bt/btusb.c: In function 'hci_reassembly':
>> /home/dvb/rtl8723au_bt/btusb.c:376:15: error: 'NUM_REASSEMBLY' 
>> undeclared (first
>> use in this function)
>>        index >= NUM_REASSEMBLY)
>>                 ^
>> /home/dvb/rtl8723au_bt/btusb.c:376:15: note: each undeclared 
>> identifier is
>> reported only once for each function it appears in
>> /home/dvb/rtl8723au_bt/btusb.c:379:12: error: 'struct hci_dev' has no 
>> member
>> named 'reassembly'
>>    skb = hdev->reassembly[index];
>>              ^
>> /home/dvb/rtl8723au_bt/btusb.c:405:7: error: 'struct hci_dev' has no 
>> member
>> named 'reassembly'
>>     hdev->reassembly[index] = skb;
>>         ^
>> /home/dvb/rtl8723au_bt/btusb.c:427:10: error: 'struct hci_dev' has no 
>> member
>> named 'reassembly'
>>        hdev->reassembly[index] = NULL;
>>            ^
>> /home/dvb/rtl8723au_bt/btusb.c:440:10: error: 'struct hci_dev' has no 
>> member
>> named 'reassembly'
>>        hdev->reassembly[index] = NULL;
>>            ^
>> /home/dvb/rtl8723au_bt/btusb.c:453:10: error: 'struct hci_dev' has no 
>> member
>> named 'reassembly'
>>        hdev->reassembly[index] = NULL;
>>            ^
>> /home/dvb/rtl8723au_bt/btusb.c:466:8: error: 'struct hci_dev' has no 
>> member
>> named 'reassembly'
>>      hdev->reassembly[index] = NULL;
>>          ^
>> scripts/Makefile.build:264: recipe for target 
>> '/home/dvb/rtl8723au_bt/btusb.o'
>> failed
>> make[2]: *** [/home/dvb/rtl8723au_bt/btusb.o] Error 1
>> Makefile:1384: recipe for target '_module_/home/dvb/rtl8723au_bt' failed
>> make[1]: *** [_module_/home/dvb/rtl8723au_bt] Error 2
>> make[1]: Leaving directory
>> '/home/dvb/toradex/linux-toradex/linux-toradex-vf/linux-toradex'
>> Makefile-custom:22: recipe for target 'all' failed
>> make: *** [all] Error 2
>> .....
>>
>> I also tried the recent branches all got the same errors.
>> Does any one tested RTL8723BU's bluetooth?
>
> No. I have an RTL8723BU device on order. Once it arrives, I will be 
> able to test. The vendor BT driver relies on some features that were 
> removed in kernel 4.1. As a proper driver for the Realtek BT devices 
> is in kernel 4.2, I suggest that you use it, rather than 4.1.

Ok, sure will give a try with 4.2

>
>
>> I couldn't find any in-tree driver available for RTL8723BU. Is there 
>> anything
>> i'm missing or
>> doing wrong ?
>
> No, there is none. I refuse to submit any code that I have not tested. 
> In addition, I doubt that the vendor driver will ever be submitted to 
> staging. It is just too much work to clean up that ugly code. More 
> likely, the device will be added to the new driver rtl8xxxu that has 
> just been submitted.

Great! i will also try to test your patch at my end. Is there any latest version of patchset submitted? I found an RFC version[1] after googling? let me know if any latest version of patchest is submitted.

[1] http://patchwork.ozlabs.org/patch/234928/

Best regards,
Bhuvan

>
> Larry
>