linux-kernel - Re: [PATCH v9 2/6] usb:gadget Separated decoding functions from dwc3 driver.

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Date:   Fri, 5 Jul 2019 13:49:11 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Pawel Laszczak <pawell@...ence.com>
Cc:     "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "felipe.balbi@...ux.intel.com" <felipe.balbi@...ux.intel.com>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "hdegoede@...hat.com" <hdegoede@...hat.com>,
        "heikki.krogerus@...ux.intel.com" <heikki.krogerus@...ux.intel.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "rogerq@...com" <rogerq@...com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "jbergsagel@...com" <jbergsagel@...com>,
        "nsekhar@...com" <nsekhar@...com>, "nm@...com" <nm@...com>,
        Suresh Punnoose <sureshp@...ence.com>,
        "peter.chen@....com" <peter.chen@....com>,
        Jayshri Dajiram Pawar <jpawar@...ence.com>,
        Rahul Kumar <kurahul@...ence.com>
Subject: Re: [PATCH v9 2/6] usb:gadget Separated decoding functions from dwc3
 driver.

On Fri, Jul 05, 2019 at 11:39:57AM +0000, Pawel Laszczak wrote:
> 
> >On Fri, Jul 05, 2019 at 11:57:14AM +0100, Pawel Laszczak wrote:
> >> Patch moves some decoding functions from driver/usb/dwc3/debug.h driver
> >> to driver/usb/gadget/debug.c file. These moved functions include:
> >>     dwc3_decode_get_status
> >>     dwc3_decode_set_clear_feature
> >>     dwc3_decode_set_address
> >>     dwc3_decode_get_set_descriptor
> >>     dwc3_decode_get_configuration
> >>     dwc3_decode_set_configuration
> >>     dwc3_decode_get_intf
> >>     dwc3_decode_set_intf
> >>     dwc3_decode_synch_frame
> >>     dwc3_decode_set_sel
> >>     dwc3_decode_set_isoch_delay
> >>     dwc3_decode_ctrl
> >>
> >> These functions are used also in inroduced cdns3 driver.
> >>
> >> All functions prefixes were changed from dwc3 to usb.
> >> Also, function's parameters has been extended according to the name
> >> of fields in standard SETUP packet.
> >> Additionally, patch adds usb_decode_ctrl function to
> >> include/linux/usb/gadget.h file.
> >
> >No it does not :(
> 
> I've forgot about this :( 
> 
> It should be include/linux/usb/ch.9.h
> 
> >
> >> Signed-off-by: Pawel Laszczak <pawell@...ence.com>
> >> ---
> >>  drivers/usb/common/Makefile |   5 +
> >>  drivers/usb/common/debug.c  | 268 ++++++++++++++++++++++++++++++++++++
> >>  drivers/usb/dwc3/debug.h    | 252 ---------------------------------
> >>  drivers/usb/dwc3/trace.h    |   2 +-
> >>  include/linux/usb/ch9.h     |  25 ++++
> >>  5 files changed, 299 insertions(+), 253 deletions(-)
> >>  create mode 100644 drivers/usb/common/debug.c
> >>
> >> diff --git a/drivers/usb/common/Makefile b/drivers/usb/common/Makefile
> >> index 0a7c45e85481..cdc66b59a6f0 100644
> >> --- a/drivers/usb/common/Makefile
> >> +++ b/drivers/usb/common/Makefile
> >> @@ -5,6 +5,11 @@
> >>
> >>  obj-$(CONFIG_USB_COMMON)	  += usb-common.o
> >>  usb-common-y			  += common.o
> >> +
> >> +ifneq ($(CONFIG_TRACING),)
> >> +	usb-common-y		  += debug.o
> >> +endif
> >
> >So only enable this if tracing is not emabled?  Or if enabled?  I'm
> >confused, isn't there an easier way to write this?
> 
> It's checks if CONFIG_TRACING is enable. 
> It's a common way checking if option is enabled in usb subsystem. 

Why not just write this as:
	usb-common-$(CONFIG_TRACING)	+= debug.o
?

thanks,

greg k-h