linux-kernel - Re: [PATCH v4 04/46] staging: emxx_udc: add ep capabilities support

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Message-ID: <20150730140829.GA18246@saruman.tx.rr.com>
Date:	Thu, 30 Jul 2015 09:08:29 -0500
From:	Felipe Balbi <balbi@...com>
To:	Robert Baldyga <r.baldyga@...sung.com>
CC:	<balbi@...com>, <gregkh@...uxfoundation.org>,
	<Peter.Chen@...escale.com>, <johnyoun@...opsys.com>,
	<dahlmann.thomas@...or.de>, <nicolas.ferre@...el.com>,
	<cernekee@...il.com>, <leoli@...escale.com>, <daniel@...que.org>,
	<haojian.zhuang@...il.com>, <robert.jarzmik@...e.fr>,
	<michal.simek@...inx.com>, <devel@...verdev.osuosl.org>,
	<linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>,
	<linux-omap@...r.kernel.org>, <linux-geode@...ts.infradead.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linuxppc-dev@...ts.ozlabs.org>, <andrzej.p@...sung.com>,
	<m.szyprowski@...sung.com>, <stern@...land.harvard.edu>,
	<petr.cvek@....cz>
Subject: Re: [PATCH v4 04/46] staging: emxx_udc: add ep capabilities support

Hi,

On Thu, Jul 30, 2015 at 09:15:38AM +0200, Robert Baldyga wrote:
> On 07/29/2015 05:20 PM, Felipe Balbi wrote:
> > On Mon, Jul 27, 2015 at 11:16:14AM +0200, Robert Baldyga wrote:
> >> Convert endpoint configuration to new capabilities model.
> >>
> >> Fixed typo in "epc-nulk" to "epc-bulk".
> >>
> >> Signed-off-by: Robert Baldyga <r.baldyga@...sung.com>
> >> ---
> >>  drivers/staging/emxx_udc/emxx_udc.c | 60 ++++++++++++++++++-------------------
> >>  1 file changed, 29 insertions(+), 31 deletions(-)
> >>
> >> diff --git a/drivers/staging/emxx_udc/emxx_udc.c b/drivers/staging/emxx_udc/emxx_udc.c
> >> index 3b7aa36..0d64bee 100644
> >> --- a/drivers/staging/emxx_udc/emxx_udc.c
> >> +++ b/drivers/staging/emxx_udc/emxx_udc.c
> >> @@ -3153,36 +3153,33 @@ static const struct usb_gadget_ops nbu2ss_gadget_ops = {
> >>  	.ioctl			= nbu2ss_gad_ioctl,
> >>  };
> >>  
> >> -static const char g_ep0_name[] = "ep0";
> >> -static const char g_ep1_name[] = "ep1-bulk";
> >> -static const char g_ep2_name[] = "ep2-bulk";
> >> -static const char g_ep3_name[] = "ep3in-int";
> >> -static const char g_ep4_name[] = "ep4-iso";
> >> -static const char g_ep5_name[] = "ep5-iso";
> >> -static const char g_ep6_name[] = "ep6-bulk";
> >> -static const char g_ep7_name[] = "ep7-bulk";
> >> -static const char g_ep8_name[] = "ep8in-int";
> >> -static const char g_ep9_name[] = "ep9-iso";
> >> -static const char g_epa_name[] = "epa-iso";
> >> -static const char g_epb_name[] = "epb-bulk";
> >> -static const char g_epc_name[] = "epc-nulk";
> >> -static const char g_epd_name[] = "epdin-int";
> >> -
> >> -static const char *gp_ep_name[NUM_ENDPOINTS] = {
> >> -	g_ep0_name,
> >> -	g_ep1_name,
> >> -	g_ep2_name,
> >> -	g_ep3_name,
> >> -	g_ep4_name,
> >> -	g_ep5_name,
> >> -	g_ep6_name,
> >> -	g_ep7_name,
> >> -	g_ep8_name,
> >> -	g_ep9_name,
> >> -	g_epa_name,
> >> -	g_epb_name,
> >> -	g_epc_name,
> >> -	g_epd_name,
> >> +static const struct {
> >> +	const char *name;
> >> +	const struct usb_ep_caps caps;
> >> +} ep_info[NUM_ENDPOINTS] = {
> >> +#define EP_INFO(_name, _type, _dir) \
> >> +	{ \
> >> +		.name = _name, \
> >> +		.caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_ ## _type, \
> >> +				USB_EP_CAPS_DIR_ ## _dir), \
> >> +	}
> >> +
> >> +	EP_INFO("ep0",		CONTROL, ALL),
> >> +	EP_INFO("ep1-bulk",	BULK,	ALL),
> >> +	EP_INFO("ep2-bulk",	BULK,	ALL),
> >> +	EP_INFO("ep3in-int",	INT,	IN),
> >> +	EP_INFO("ep4-iso",	INT,	ALL),
> >> +	EP_INFO("ep5-iso",	ISO,	ALL),
> >> +	EP_INFO("ep6-bulk",	ISO,	ALL),
> >> +	EP_INFO("ep7-bulk",	BULK,	ALL),
> >> +	EP_INFO("ep8in-int",	INT,	IN),
> >> +	EP_INFO("ep9-iso",	ISO,	ALL),
> >> +	EP_INFO("epa-iso",	ISO,	ALL),
> >> +	EP_INFO("epb-bulk",	BULK,	ALL),
> >> +	EP_INFO("epc-bulk",	BULK,	ALL),
> >> +	EP_INFO("epdin-int",	INT,	IN),
> > 
> > IMO, this is pointless obfuscation. It just makes it a pain to grep
> > source around. Why don't you have UDC drivers initialize the 1-bit flags
> > directly ?
> > 
> 
> Do you mean something like this? It just makes it a pain to scroll this
> source ;)

but it's at least easy to grep. Another option would be the following:

EP_INFO("ep0", USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL,
			USB_EP_CAPS_DIR_ALL)),

that also helps grepping.

-- 
balbi

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