linux-kernel - RE: [PATCH 02/31] usb: usbssp: Added some decoding functions.

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Message-ID: <BYAPR07MB4709D6250C7CD0941E39272BDD040@BYAPR07MB4709.namprd07.prod.outlook.com>
Date:   Tue, 11 Sep 2018 09:01:13 +0000
From:   Pawel Laszczak <pawell@...ence.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Felipe Balbi <balbi@...nel.org>
CC:     "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Lukasz Tyrala <ltyrala@...ence.com>,
        Alan Douglas <adouglas@...ence.com>
Subject: RE: [PATCH 02/31] usb: usbssp: Added some decoding functions.

HI, All 
 
Please stop review of this series. It's a pity of your time. 

Probably the design of USBSSP device controller will be significantly changed and simplified, so 
I will have to create new driver. 

The planed change include: 
   - simplification and change registers map
   - removing command queue 
   -  simplification  in input/output endpoint context
   - and other.


It was not my decision. Thanks for all  your comments.
I will take them into account in new driver. 

Cheers,
Pawell




>On Tue, Sep 11, 2018 at 08:48:43AM +0300, Felipe Balbi wrote:
>>
>> Hi,
>>
>> Greg Kroah-Hartman <gregkh@...uxfoundation.org> writes:
>> > On Thu, Jul 19, 2018 at 06:57:35PM +0100, Pawel Laszczak wrote:
>> >> This patch add additional functions that converts some fields to string.
>> >>
>> >> For example function usbssp_trb_comp_code_string take completion
>> >> code value and return string describing completion code.
>> >>
>> >> Signed-off-by: Pawel Laszczak <pawell@...ence.com>
>> >> ---
>> >>  drivers/usb/usbssp/gadget.h | 580 ++++++++++++++++++++++++++++++++++++
>> >>  1 file changed, 580 insertions(+)
>> >>
>> >> diff --git a/drivers/usb/usbssp/gadget.h b/drivers/usb/usbssp/gadget.h
>> >> index 49e7271187cc..b5c17603af78 100644
>> >> --- a/drivers/usb/usbssp/gadget.h
>> >> +++ b/drivers/usb/usbssp/gadget.h
>> >> @@ -930,6 +930,73 @@ struct usbssp_transfer_event {
>> >>  #define COMP_UNDEFINED_ERROR			33
>> >>  #define COMP_INVALID_STREAM_ID_ERROR		34
>> >>
>> >> +static inline const char *usbssp_trb_comp_code_string(u8 status)
>> >
>> > <snip>
>> >
>> >
>> > You have _giant_ inline functions here, why?
>> >
>> > Please just put this all in a .c file and let the linker properly handle
>> > things.  You do not want to duplicate all of these crazy strings all
>> > over the place where ever you call these functions.
>> >
>> > And I am guessing this is only for some sort of "debugging" mode?  If
>> > so, shouldn't there be a way to not even build this in?  Some systems
>> > are very space constrained...
>>
>> many of them seem to be a straight copy from xhci.
>
>Which doesn't mean it's a great model to copy :)
>
>Let's learn from our past mistakes, having had to try to slim down a
>kernel for a limited memory system is a chore that no one should have to
>manually hack up the source tree just to accomplish it.
>
>thanks,
>
>greg k-h