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Message-ID: <20240930134151.GI31662@pendragon.ideasonboard.com>
Date: Mon, 30 Sep 2024 16:41:51 +0300
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Ricardo Ribalda <ribalda@...omium.org>
Cc: Hans Verkuil <hverkuil@...all.nl>, Julia Lawall <Julia.Lawall@...ia.fr>,
Sakari Ailus <sakari.ailus@...ux.intel.com>,
Bingbu Cao <bingbu.cao@...el.com>,
Tianshu Qiu <tian.shu.qiu@...el.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Hans de Goede <hdegoede@...hat.com>,
Andy Shevchenko <andy@...nel.org>, Mike Isely <isely@...ox.com>,
Olli Salonen <olli.salonen@....fi>,
Maxim Levitsky <maximlevitsky@...il.com>,
Sean Young <sean@...s.org>, Sergey Kozlov <serjk@...up.ru>,
Abylay Ospan <aospan@...up.ru>, Jemma Denson <jdenson@...il.com>,
Patrick Boettcher <patrick.boettcher@...teo.de>,
Ming Qian <ming.qian@....com>, Zhou Peng <eagle.zhou@....com>,
Andy Walls <awalls@...metrocast.net>,
Michal Simek <michal.simek@....com>,
Jean-Christophe Trotin <jean-christophe.trotin@...s.st.com>,
Philipp Zabel <p.zabel@...gutronix.de>,
Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Fabio Estevam <festevam@...il.com>,
Eddie James <eajames@...ux.ibm.com>, Joel Stanley <joel@....id.au>,
Andrew Jeffery <andrew@...econstruct.com.au>,
Hans Verkuil <hverkuil-cisco@...all.nl>,
Tomasz Figa <tfiga@...omium.org>,
Marek Szyprowski <m.szyprowski@...sung.com>,
Tim Harvey <tharvey@...eworks.com>,
Benjamin Mugnier <benjamin.mugnier@...s.st.com>,
Sylvain Petinot <sylvain.petinot@...s.st.com>,
Jacopo Mondi <jacopo+renesas@...ndi.org>,
Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
Niklas Söderlund <niklas.soderlund+renesas@...natech.se>,
linux-media@...r.kernel.org, linux-staging@...ts.linux.dev,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
imx@...ts.linux.dev, openbmc@...ts.ozlabs.org,
linux-aspeed@...ts.ozlabs.org
Subject: Re: [PATCH 00/45] media: Use string_choice helpers
On Mon, Sep 30, 2024 at 02:53:51PM +0200, Ricardo Ribalda wrote:
> On Mon, 30 Sept 2024 at 14:38, Hans Verkuil wrote:
> > On 30/09/2024 14:21, Laurent Pinchart wrote:
> > > Hi Ricardo,
> > >
> > > On Mon, Sep 30, 2024 at 12:03:55PM +0000, Ricardo Ribalda wrote:
> > >> include/linux/string_choices.h contains a set of helpers that can be
> > >> used instead of hard coding some strings.
> > >>
> > >> Cocci has located some places where the helpers can be used. This
> > >> patchset uses the diff generated by cocci, plus these changes:
> > >
> > > Personally I think most of those helpers just hinder readability for not
> > > much added gain. String de-duplication is done by the linker already.
> > > The only value I see in the helpers is ensuring that the strings are
> > > consistently written, and I think we can do so through other means.
> >
> > Just my opinion: I'm OK with these new helpers, but I am not too keen to apply
> > all this to existing source code. I.e., for new code it is fine, but if we have
> > to update all drivers every time a new cocci test is added, then that will not
> > scale.
> >
> > Note that I never ran cocci in my build scripts, so this is a new check that
> > we haven't set rules for or have much experience with.
> >
> > checkpatch just checks the patches, it doesn't force you to fix existing code.
> >
> > Some of the cocci tests are clearly checking for incorrect code, but others are
> > for code improvements (i.e. the code was correct, it can just be done slightly
> > better). It's the second category were I think that should only apply to new code,
> > and not existing code.
> >
> > Regards,
>
> Julia, correct me if I am wrong, but I believe that cocci does not
> have the ability to check only new code. It runs against files not
> diffs.
>
> I agree with you, a "improvement cocci" shall not force us to drop the
> pen and work full time to fix it :)
> When a new "improvement" cocci check is landed, we should update our
> "allowlist" immediately to ignore those warnings until we slowly
> improve our codebase to meet the standard.
> That way the CI is not affected.
>
> Regarding this patchset.... It is pretty big, but also pretty simple.
> I added my "extra changes" on the cover letter to ease the review.
>
> If you or someone else have time to review it... then it will be great
> if we land it. But if none has time for it, then it can be ignored.
More than just a matter of review time, I would prefer avoiding these
changes in the drivers I maintain.
> > >> diff --git a/drivers/media/dvb-frontends/ascot2e.c b/drivers/media/dvb-frontends/ascot2e.c
> > >> index 8c3eb5d69dda..ec7a718428fc 100644
> > >> --- a/drivers/media/dvb-frontends/ascot2e.c
> > >> +++ b/drivers/media/dvb-frontends/ascot2e.c
> > >> @@ -104,7 +104,7 @@ static void ascot2e_i2c_debug(struct ascot2e_priv *priv,
> > >> u8 reg, u8 write, const u8 *data, u32 len)
> > >> {
> > >> dev_dbg(&priv->i2c->dev, "ascot2e: I2C %s reg 0x%02x size %d\n",
> > >> - str_read_write(write == 0), reg, len);
> > >> + str_write_read(write), reg, len);
> > >> print_hex_dump_bytes("ascot2e: I2C data: ",
> > >> DUMP_PREFIX_OFFSET, data, len);
> > >> }
> > >> diff --git a/drivers/media/dvb-frontends/cxd2841er.c b/drivers/media/dvb-frontends/cxd2841er.c
> > >> index db684f314b47..d1b84cd9c510 100644
> > >> --- a/drivers/media/dvb-frontends/cxd2841er.c
> > >> +++ b/drivers/media/dvb-frontends/cxd2841er.c
> > >> @@ -206,7 +206,7 @@ static void cxd2841er_i2c_debug(struct cxd2841er_priv *priv,
> > >> {
> > >> dev_dbg(&priv->i2c->dev,
> > >> "cxd2841er: I2C %s addr %02x reg 0x%02x size %d data %*ph\n",
> > >> - str_read_write(write == 0), addr, reg, len, len, data);
> > >> + str_write_read(write), addr, reg, len, len, data);
> > >> }
> > >>
> > >> static int cxd2841er_write_regs(struct cxd2841er_priv *priv,
> > >> diff --git a/drivers/media/dvb-frontends/helene.c b/drivers/media/dvb-frontends/helene.c
> > >> index 52198cb49dba..b4527c141d9c 100644
> > >> --- a/drivers/media/dvb-frontends/helene.c
> > >> +++ b/drivers/media/dvb-frontends/helene.c
> > >> @@ -279,7 +279,7 @@ static void helene_i2c_debug(struct helene_priv *priv,
> > >> u8 reg, u8 write, const u8 *data, u32 len)
> > >> {
> > >> dev_dbg(&priv->i2c->dev, "helene: I2C %s reg 0x%02x size %d\n",
> > >> - str_read_write(write == 0), reg, len);
> > >> + str_write_read(write), reg, len);
> > >> print_hex_dump_bytes("helene: I2C data: ",
> > >> DUMP_PREFIX_OFFSET, data, len);
> > >> }
> > >> diff --git a/drivers/media/dvb-frontends/horus3a.c b/drivers/media/dvb-frontends/horus3a.c
> > >> index 84385079918c..10300ebf3ca0 100644
> > >> --- a/drivers/media/dvb-frontends/horus3a.c
> > >> +++ b/drivers/media/dvb-frontends/horus3a.c
> > >> @@ -38,7 +38,7 @@ static void horus3a_i2c_debug(struct horus3a_priv *priv,
> > >> u8 reg, u8 write, const u8 *data, u32 len)
> > >> {
> > >> dev_dbg(&priv->i2c->dev, "horus3a: I2C %s reg 0x%02x size %d\n",
> > >> - str_read_write(write == 0), reg, len);
> > >> + str_write_read(write), reg, len);
> > >> print_hex_dump_bytes("horus3a: I2C data: ",
> > >> DUMP_PREFIX_OFFSET, data, len);
> > >> }
> > >> diff --git a/drivers/media/i2c/adv7842.c b/drivers/media/i2c/adv7842.c
> > >> index ba174aa45afa..a43479c3ff03 100644
> > >> --- a/drivers/media/i2c/adv7842.c
> > >> +++ b/drivers/media/i2c/adv7842.c
> > >> @@ -2763,7 +2763,7 @@ static int adv7842_cp_log_status(struct v4l2_subdev *sd)
> > >> str_true_false(io_read(sd, 0x6a) & 0x10));
> > >> }
> > >> v4l2_info(sd, "CP free run: %s\n",
> > >> - str_on_off(!!(cp_read(sd, 0xff) & 0x10)));
> > >> + str_on_off(cp_read(sd, 0xff) & 0x10));
> > >> v4l2_info(sd, "Prim-mode = 0x%x, video std = 0x%x, v_freq = 0x%x\n",
> > >> io_read(sd, 0x01) & 0x0f, io_read(sd, 0x00) & 0x3f,
> > >> (io_read(sd, 0x01) & 0x70) >> 4);
> > >> diff --git a/drivers/media/pci/saa7134/saa7134-cards.c b/drivers/media/pci/saa7134/saa7134-cards.c
> > >> index 301b89e799d8..79cd61fb0205 100644
> > >> --- a/drivers/media/pci/saa7134/saa7134-cards.c
> > >> +++ b/drivers/media/pci/saa7134/saa7134-cards.c
> > >> @@ -7981,7 +7981,7 @@ int saa7134_board_init2(struct saa7134_dev *dev)
> > >> rc = i2c_transfer(&dev->i2c_adap, &msg, 1);
> > >> pr_info("%s: probe IR chip @ i2c 0x%02x: %s\n",
> > >> dev->name, msg.addr,
> > >> - str_yes_no(1 == rc));
> > >> + str_yes_no(rc == 1));
> > >> if (rc == 1)
> > >> dev->has_remote = SAA7134_REMOTE_I2C;
> > >> }
> > >> diff --git a/drivers/media/pci/saa7134/saa7134-input.c b/drivers/media/pci/saa7134/saa7134-input.c
> > >> index 90837ec6e70f..239f0b9d080a 100644
> > >> --- a/drivers/media/pci/saa7134/saa7134-input.c
> > >> +++ b/drivers/media/pci/saa7134/saa7134-input.c
> > >> @@ -895,7 +895,7 @@ void saa7134_probe_i2c_ir(struct saa7134_dev *dev)
> > >> rc = i2c_transfer(&dev->i2c_adap, &msg_msi, 1);
> > >> input_dbg("probe 0x%02x @ %s: %s\n",
> > >> msg_msi.addr, dev->i2c_adap.name,
> > >> - str_yes_no(1 == rc));
> > >> + str_yes_no(rc == 1));
> > >> break;
> > >> case SAA7134_BOARD_SNAZIO_TVPVR_PRO:
> > >> dev->init_data.name = "SnaZio* TVPVR PRO";
> > >> @@ -931,7 +931,7 @@ void saa7134_probe_i2c_ir(struct saa7134_dev *dev)
> > >> rc = i2c_transfer(&dev->i2c_adap, &msg_msi, 1);
> > >> input_dbg("probe 0x%02x @ %s: %s\n",
> > >> msg_msi.addr, dev->i2c_adap.name,
> > >> - str_yes_no(1 == rc));
> > >> + str_yes_no(rc == 1));
> > >> break;
> > >> case SAA7134_BOARD_HAUPPAUGE_HVR1110:
> > >> dev->init_data.name = saa7134_boards[dev->board].name;
> > >> diff --git a/drivers/media/usb/pvrusb2/pvrusb2-ctrl.c b/drivers/media/usb/pvrusb2/pvrusb2-ctrl.c
> > >> index 448c40caf363..b6c9bda214c8 100644
> > >> --- a/drivers/media/usb/pvrusb2/pvrusb2-ctrl.c
> > >> +++ b/drivers/media/usb/pvrusb2/pvrusb2-ctrl.c
> > >> @@ -521,7 +521,7 @@ int pvr2_ctrl_value_to_sym_internal(struct pvr2_ctrl *cptr,
> > >> *len = scnprintf(buf,maxlen,"%d",val);
> > >> ret = 0;
> > >> } else if (cptr->info->type == pvr2_ctl_bool) {
> > >> - *len = scnprintf(buf,maxlen,"%s",str_true_false(val));
> > >> + *len = scnprintf(buf, maxlen, "%s", str_true_false(val));
> > >> ret = 0;
> > >> } else if (cptr->info->type == pvr2_ctl_enum) {
> > >> const char * const *names;
> > >> diff --git a/drivers/media/usb/pvrusb2/pvrusb2-hdw.c b/drivers/media/usb/pvrusb2/pvrusb2-hdw.c
> > >> index 96d3a0045fac..761d718478ca 100644
> > >> --- a/drivers/media/usb/pvrusb2/pvrusb2-hdw.c
> > >> +++ b/drivers/media/usb/pvrusb2/pvrusb2-hdw.c
> > >> @@ -338,7 +338,7 @@ static void trace_stbit(const char *name,int val)
> > >> {
> > >> pvr2_trace(PVR2_TRACE_STBITS,
> > >> "State bit %s <-- %s",
> > >> - name,str_true_false(val));
> > >> + name, str_true_false(val));
> > >> }
> > >>
> > >> Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
> > >> ---
> > >> Ricardo Ribalda (45):
> > >> media: staging: ipu3: Use string_choices helpers
> > >> media: staging: atomisp: Use string_choices helpers
> > >> media: core: Use string_choices helpers
> > >> media: pwc-ctl: Use string_choices helpers
> > >> media: pvrusb2:Use string_choices helpers
> > >> media: em28xx: Use string_choices helpers
> > >> media: dvb-usb: Use string_choices helpers
> > >> media: dvb-usb-v2: Use string_choices helpers
> > >> media: cx231xx: Use string_choices helpers
> > >> media: tuners: Use string_choices helpers
> > >> media: rc: Use string_choices helpers
> > >> media: dvb-frontends: Use string_choices helpers
> > >> media: pci: cx23885: Use string_choices helpers
> > >> media: saa7134: Use string_choices helpers
> > >> media: amphion: Use string_choices helpers
> > >> media: pci: ivtv: Use string_choices helpers
> > >> media: bttv: Use string_choices helpers
> > >> media: xilinx: Use string_choices helpers
> > >> media: platform: ti: Use string_choices helpers
> > >> media: st: Use string_choices helpers
> > >> media: coda: Use string_choices helpers
> > >> media: aspeed: Use string_choices helpers
> > >> media: ipu6: Use string_choices helpers
> > >> media: cx18: Use string_choices helpers
> > >> media: cobalt: Use string_choices helpers
> > >> media: videobuf2: Use string_choices helpers
> > >> media: cec: Use string_choices helpers
> > >> media: b2c2: Use string_choices helpers
> > >> media: siano: Use string_choices helpers
> > >> media: i2c: cx25840: Use string_choices helpers
> > >> media: i2c: vpx3220: Use string_choices helpers
> > >> media: i2c: tvp7002: Use string_choices helpers
> > >> media: i2c: ths8200: Use string_choices helpers
> > >> media: i2c: tda1997x: Use string_choices helpers
> > >> media: i2c: tc358743: Use string_choices helpers
> > >> media: i2c: st-mipid02: Use string_choices helpers
> > >> media: i2c: msp3400: Use string_choices helpers
> > >> media: i2c: max9286: Use string_choices helpers
> > >> media: i2c: saa717x: Use string_choices helpers
> > >> media: i2c: saa7127: Use string_choices helpers
> > >> media: i2c: saa7115: Use string_choices helpers
> > >> media: i2c: saa7110: Use string_choices helpers
> > >> media: i2c: adv7842: Use string_choices helpers
> > >> media: i2c: adv76xx: Use string_choices helpers
> > >> media: i2c: adv7511: Use string_choices helpers
> > >>
> > >> drivers/media/cec/platform/cec-gpio/cec-gpio.c | 4 +-
> > >> drivers/media/cec/usb/pulse8/pulse8-cec.c | 4 +-
> > >> drivers/media/common/b2c2/flexcop-hw-filter.c | 4 +-
> > >> drivers/media/common/siano/sms-cards.c | 3 +-
> > >> drivers/media/common/videobuf2/videobuf2-core.c | 5 ++-
> > >> drivers/media/dvb-frontends/ascot2e.c | 2 +-
> > >> drivers/media/dvb-frontends/cx24120.c | 4 +-
> > >> drivers/media/dvb-frontends/cxd2841er.c | 2 +-
> > >> drivers/media/dvb-frontends/drxk_hard.c | 4 +-
> > >> drivers/media/dvb-frontends/helene.c | 2 +-
> > >> drivers/media/dvb-frontends/horus3a.c | 2 +-
> > >> drivers/media/dvb-frontends/sp2.c | 2 +-
> > >> drivers/media/i2c/adv7511-v4l2.c | 11 +++---
> > >> drivers/media/i2c/adv7604.c | 25 ++++++------
> > >> drivers/media/i2c/adv7842.c | 40 ++++++++++----------
> > >> drivers/media/i2c/cx25840/cx25840-core.c | 4 +-
> > >> drivers/media/i2c/cx25840/cx25840-ir.c | 34 ++++++++---------
> > >> drivers/media/i2c/max9286.c | 2 +-
> > >> drivers/media/i2c/msp3400-driver.c | 4 +-
> > >> drivers/media/i2c/saa7110.c | 2 +-
> > >> drivers/media/i2c/saa7115.c | 2 +-
> > >> drivers/media/i2c/saa7127.c | 15 +++++---
> > >> drivers/media/i2c/saa717x.c | 2 +-
> > >> drivers/media/i2c/st-mipid02.c | 2 +-
> > >> drivers/media/i2c/tc358743.c | 44 ++++++++++------------
> > >> drivers/media/i2c/tda1997x.c | 6 +--
> > >> drivers/media/i2c/ths8200.c | 4 +-
> > >> drivers/media/i2c/tvp7002.c | 2 +-
> > >> drivers/media/i2c/vpx3220.c | 2 +-
> > >> drivers/media/pci/bt8xx/bttv-cards.c | 16 ++++----
> > >> drivers/media/pci/bt8xx/bttv-driver.c | 6 +--
> > >> drivers/media/pci/cobalt/cobalt-driver.c | 2 +-
> > >> drivers/media/pci/cx18/cx18-av-core.c | 4 +-
> > >> drivers/media/pci/cx23885/altera-ci.c | 2 +-
> > >> drivers/media/pci/cx23885/cimax2.c | 2 +-
> > >> drivers/media/pci/cx23885/cx23888-ir.c | 36 +++++++++---------
> > >> drivers/media/pci/intel/ipu6/ipu6-isys-csi2.c | 2 +-
> > >> drivers/media/pci/ivtv/ivtvfb.c | 4 +-
> > >> drivers/media/pci/saa7134/saa7134-cards.c | 2 +-
> > >> drivers/media/pci/saa7134/saa7134-dvb.c | 2 +-
> > >> drivers/media/pci/saa7134/saa7134-input.c | 6 +--
> > >> drivers/media/pci/saa7134/saa7134-video.c | 2 +-
> > >> drivers/media/platform/amphion/venc.c | 2 +-
> > >> drivers/media/platform/amphion/vpu_dbg.c | 2 +-
> > >> drivers/media/platform/aspeed/aspeed-video.c | 4 +-
> > >> drivers/media/platform/chips-media/coda/imx-vdoa.c | 3 +-
> > >> drivers/media/platform/st/sti/hva/hva-debugfs.c | 6 +--
> > >> drivers/media/platform/ti/omap3isp/ispstat.c | 2 +-
> > >> drivers/media/platform/xilinx/xilinx-csi2rxss.c | 18 ++++-----
> > >> drivers/media/rc/ene_ir.c | 3 +-
> > >> drivers/media/rc/mceusb.c | 3 +-
> > >> drivers/media/rc/serial_ir.c | 5 ++-
> > >> drivers/media/tuners/tda18250.c | 2 +-
> > >> drivers/media/tuners/tda9887.c | 10 ++---
> > >> drivers/media/usb/cx231xx/cx231xx-i2c.c | 4 +-
> > >> drivers/media/usb/cx231xx/cx231xx-video.c | 2 +-
> > >> drivers/media/usb/dvb-usb-v2/az6007.c | 4 +-
> > >> drivers/media/usb/dvb-usb-v2/dvb_usb_core.c | 4 +-
> > >> drivers/media/usb/dvb-usb/af9005-fe.c | 4 +-
> > >> drivers/media/usb/dvb-usb/dvb-usb-dvb.c | 6 +--
> > >> drivers/media/usb/dvb-usb/opera1.c | 8 ++--
> > >> drivers/media/usb/em28xx/em28xx-i2c.c | 4 +-
> > >> drivers/media/usb/em28xx/em28xx-video.c | 2 +-
> > >> drivers/media/usb/pvrusb2/pvrusb2-ctrl.c | 2 +-
> > >> drivers/media/usb/pvrusb2/pvrusb2-debugifc.c | 3 +-
> > >> drivers/media/usb/pvrusb2/pvrusb2-encoder.c | 5 +--
> > >> drivers/media/usb/pvrusb2/pvrusb2-hdw.c | 6 +--
> > >> drivers/media/usb/pvrusb2/pvrusb2-i2c-core.c | 3 +-
> > >> drivers/media/usb/pwc/pwc-ctrl.c | 2 +-
> > >> drivers/media/v4l2-core/v4l2-ctrls-core.c | 3 +-
> > >> drivers/media/v4l2-core/v4l2-fwnode.c | 12 +++---
> > >> .../media/atomisp/pci/atomisp_compat_css20.c | 2 +-
> > >> .../media/atomisp/pci/atomisp_csi2_bridge.c | 2 +-
> > >> .../media/atomisp/pci/atomisp_gmin_platform.c | 4 +-
> > >> drivers/staging/media/atomisp/pci/atomisp_v4l2.c | 4 +-
> > >> .../media/atomisp/pci/runtime/binary/src/binary.c | 2 +-
> > >> drivers/staging/media/atomisp/pci/sh_css.c | 2 +-
> > >> drivers/staging/media/ipu3/ipu3-v4l2.c | 4 +-
> > >> 78 files changed, 240 insertions(+), 239 deletions(-)
> > >> ---
> > >> base-commit: 9852d85ec9d492ebef56dc5f229416c925758edc
> > >> change-id: 20240930-cocci-opportunity-40bca6a17c42
--
Regards,
Laurent Pinchart
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