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Date: Sat, 26 Mar 2022 22:08:32 +0100
From: Mauro Carvalho Chehab <mchehab@...nel.org>
To: Larry Finger <Larry.Finger@...inger.net>
Cc: Joe Perches <joe@...ches.com>,
Benjamin Stürz <benni@...erz.xyz>,
andrew@...n.ch, sebastian.hesselbarth@...il.com,
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Subject: Re: [PATCH 16/22] dvb-usb: Replace comments with C99 initializers
Em Sat, 26 Mar 2022 15:11:46 -0500
Larry Finger <Larry.Finger@...inger.net> escreveu:
> On 3/26/22 14:51, Joe Perches wrote:
> > On Sat, 2022-03-26 at 19:27 +0100, Mauro Carvalho Chehab wrote:
> >> Em Sat, 26 Mar 2022 19:24:54 +0100
> >> Mauro Carvalho Chehab <mchehab@...nel.org> escreveu:
> >>
> >>> Em Sat, 26 Mar 2022 17:59:03 +0100
> >>> Benjamin Stürz <benni@...erz.xyz> escreveu:
> >>>
> >>>> This replaces comments with C99's designated
> >>>> initializers because the kernel supports them now.
> >>>>
> >>>> Signed-off-by: Benjamin Stürz <benni@...erz.xyz>
> >>>> ---
> >>>> drivers/media/usb/dvb-usb/dibusb-mb.c | 62 +++++++++++++--------------
> >>>> drivers/media/usb/dvb-usb/dibusb-mc.c | 34 +++++++--------
> >>>> 2 files changed, 48 insertions(+), 48 deletions(-)
> >>>>
> >>>> diff --git a/drivers/media/usb/dvb-usb/dibusb-mb.c b/drivers/media/usb/dvb-usb/dibusb-mb.c
> >>>> index e9dc27f73970..f188e07f518b 100644
> >>>> --- a/drivers/media/usb/dvb-usb/dibusb-mb.c
> >>>> +++ b/drivers/media/usb/dvb-usb/dibusb-mb.c
> >>>> @@ -122,40 +122,40 @@ static int dibusb_probe(struct usb_interface *intf,
> >>>>
> >>>> /* do not change the order of the ID table */
> >>>> static struct usb_device_id dibusb_dib3000mb_table [] = {
> >>>> -/* 00 */ { USB_DEVICE(USB_VID_WIDEVIEW, USB_PID_AVERMEDIA_DVBT_USB_COLD) },
> >>>> -/* 01 */ { USB_DEVICE(USB_VID_WIDEVIEW, USB_PID_AVERMEDIA_DVBT_USB_WARM) },
> >>>> -/* 02 */ { USB_DEVICE(USB_VID_COMPRO, USB_PID_COMPRO_DVBU2000_COLD) },
> >>>> -/* 03 */ { USB_DEVICE(USB_VID_COMPRO, USB_PID_COMPRO_DVBU2000_WARM) },
> >>>> -/* 04 */ { USB_DEVICE(USB_VID_COMPRO_UNK, USB_PID_COMPRO_DVBU2000_UNK_COLD) },
> >>>> -/* 05 */ { USB_DEVICE(USB_VID_DIBCOM, USB_PID_DIBCOM_MOD3000_COLD) },
> >>>> -/* 06 */ { USB_DEVICE(USB_VID_DIBCOM, USB_PID_DIBCOM_MOD3000_WARM) },
> >>>> -/* 07 */ { USB_DEVICE(USB_VID_EMPIA, USB_PID_KWORLD_VSTREAM_COLD) },
> >>>> -/* 08 */ { USB_DEVICE(USB_VID_EMPIA, USB_PID_KWORLD_VSTREAM_WARM) },
> >>>> -/* 09 */ { USB_DEVICE(USB_VID_GRANDTEC, USB_PID_GRANDTEC_DVBT_USB_COLD) },
> >>>> -/* 10 */ { USB_DEVICE(USB_VID_GRANDTEC, USB_PID_GRANDTEC_DVBT_USB_WARM) },
> >>>> -/* 11 */ { USB_DEVICE(USB_VID_GRANDTEC, USB_PID_DIBCOM_MOD3000_COLD) },
> >>>> -/* 12 */ { USB_DEVICE(USB_VID_GRANDTEC, USB_PID_DIBCOM_MOD3000_WARM) },
> >>>> -/* 13 */ { USB_DEVICE(USB_VID_HYPER_PALTEK, USB_PID_UNK_HYPER_PALTEK_COLD) },
> >>>> -/* 14 */ { USB_DEVICE(USB_VID_HYPER_PALTEK, USB_PID_UNK_HYPER_PALTEK_WARM) },
> >>>> -/* 15 */ { USB_DEVICE(USB_VID_VISIONPLUS, USB_PID_TWINHAN_VP7041_COLD) },
> >>>> -/* 16 */ { USB_DEVICE(USB_VID_VISIONPLUS, USB_PID_TWINHAN_VP7041_WARM) },
> >>>> -/* 17 */ { USB_DEVICE(USB_VID_TWINHAN, USB_PID_TWINHAN_VP7041_COLD) },
> >>>> -/* 18 */ { USB_DEVICE(USB_VID_TWINHAN, USB_PID_TWINHAN_VP7041_WARM) },
> >>>> -/* 19 */ { USB_DEVICE(USB_VID_ULTIMA_ELECTRONIC, USB_PID_ULTIMA_TVBOX_COLD) },
> >>>> -/* 20 */ { USB_DEVICE(USB_VID_ULTIMA_ELECTRONIC, USB_PID_ULTIMA_TVBOX_WARM) },
> >>>> -/* 21 */ { USB_DEVICE(USB_VID_ULTIMA_ELECTRONIC, USB_PID_ULTIMA_TVBOX_AN2235_COLD) },
> >>>> -/* 22 */ { USB_DEVICE(USB_VID_ULTIMA_ELECTRONIC, USB_PID_ULTIMA_TVBOX_AN2235_WARM) },
> >>>> -/* 23 */ { USB_DEVICE(USB_VID_ADSTECH, USB_PID_ADSTECH_USB2_COLD) },
> >>>> +[0] = { USB_DEVICE(USB_VID_WIDEVIEW, USB_PID_AVERMEDIA_DVBT_USB_COLD) },
> >>>> +[1] = { USB_DEVICE(USB_VID_WIDEVIEW, USB_PID_AVERMEDIA_DVBT_USB_WARM) },
> >>>
> >>> While here, please properly indent this table, and respect the 80-columns limit,
> >>> e. g.:
> >>>
> >>> static struct usb_device_id dibusb_dib3000mb_table [] = {
> >>> [0] = { USB_DEVICE(USB_VID_WIDEVIEW
> >>> USB_PID_AVERMEDIA_DVBT_USB_COLD)
> >>> },
> >>> [1] = { USB_DEVICE(USB_VID_WIDEVIEW,
> >>> USB_PID_AVERMEDIA_DVBT_USB_WARM)
> >>> },
> >>> ...
> >>
> >> Err.... something went wrong with my space bar and I ended hitting send to
> >> soon... I meant:
> >>
> >> static struct usb_device_id dibusb_dib3000mb_table [] = {
> >> [0] = { USB_DEVICE(USB_VID_WIDEVIEW
> >> USB_PID_AVERMEDIA_DVBT_USB_COLD)
> >> },
> >> [1] = { USB_DEVICE(USB_VID_WIDEVIEW,
> >> USB_PID_AVERMEDIA_DVBT_USB_WARM)
> >> },
> >> ...
> >> };
> >
> > maybe static const too
> >
> > and
> >
> > maybe
> >
> > #define DIB_DEVICE(vid, pid) \
> > { USB_DEVICE(USB_VID_ ## vid, USB_PID_ ## pid) }
> >
> > so maybe
> >
> > static const struct usb_device_id dibusb_dib3000mb_table[] = {
> > [0] = DIB_DEVICE(WIDEVIEW, AVERMEDIA_DVBT_USB_COLD),
> > [1] = DIB_DEVICE(WIDEVIEW, AVERMEDIA_DVBT_USB_WARM),
> > ...
> > };
> >
> > though I _really_ doubt the value of the specific indexing.
> >
> > I think this isn't really worth changing at all.
>
> I agree. For the drivers that I maintain, I try to keep the vendor and device
> ids in numerical order. As this table does not require a special order, adding a
> new one in the middle would require redoing all of then after that point. That
> would be pointless work!
Unfortunately, that's not the case for drivers that use the legacy dvb-usb
core, as it has other tables that reference the device IDs from this table
by number.
The best here would be to do something like:
enum {
AVERMEDIA_DVBT_USB_COLD,
AVERMEDIA_DVBT_USB_WARM,
COMPRO_DVBU2000_COLD,
COMPRO_DVBU2000_WARM,
COMPRO_DVBU2000_UNK_COLD,
DIBCOM_MOD3000_COLD,
DIBCOM_MOD3000_WARM,
KWORLD_VSTREAM_COLD,
KWORLD_VSTREAM_WARM,
GRANDTEC_DVBT_USB_COLD,
GRANDTEC_DVBT_USB_WARM,
DIBCOM_MOD3000_COLD,
DIBCOM_MOD3000_WARM,
UNK_HYPER_PALTEK_COLD,
UNK_HYPER_PALTEK_WARM,
TWINHAN_VP7041_COLD,
TWINHAN_VP7041_WARM,
TWINHAN_VP7041_COLD,
TWINHAN_VP7041_WARM,
ULTIMA_TVBOX_COLD,
ULTIMA_TVBOX_WARM,
ULTIMA_TVBOX_AN2235_COLD,
ULTIMA_TVBOX_AN2235_WARM,
ADSTECH_USB2_COLD,
ADSTECH_USB2_WARM,
KYE_DVB_T_COLD,
KYE_DVB_T_WARM,
KWORLD_VSTREAM_COLD,
ULTIMA_TVBOX_USB2_COLD,
ULTIMA_TVBOX_USB2_WARM,
ULTIMA_TVBOX_ANCHOR_COLD,
};
Then define the table as:
static const struct usb_device_id dibusb_dib3000mb_table[]
{
[AVERMEDIA_DVBT_USB_COLD] = { USB_DEVICE(USB_VID_WIDEVIEW,
USB_PID_AVERMEDIA_DVBT_USB_COLD)
},
[AVERMEDIA_DVBT_USB_WARM] = { USB_DEVICE(USB_VID_WIDEVIEW,
USB_PID_AVERMEDIA_DVBT_USB_WARM)
},
...
}
(eventually, using some macro to help defining them)
Finally, change the other static tables to also use the same name,
e. g.:
static const struct dvb_usb_device_properties dibusb1_1_properties = {
...
.num_device_descs = 9,
.devices = {
{ "AVerMedia AverTV DVBT USB1.1",
{ &dibusb_dib3000mb_table[AVERMEDIA_DVBT_USB_COLD], NULL },
{ &dibusb_dib3000mb_table[AVERMEDIA_DVBT_USB_WARM], NULL },
},
...
};
The same applies to other drivers inside drivers/media/usb/dvb-usb/.
Alternatively, the drivers there should be ported to the newer DVB USB
core (dvb-usb-v2).
Thanks,
Mauro
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