| Message ID | 20220815080230.37408-1-u.kleine-koenig@pengutronix.de |
|---|---|
| Headers | show |
| Series | i2c: Make remove callback return void | expand |
On Mon, Aug 15, 2022 at 10:02:26AM +0200, Uwe Kleine-König wrote: > Returning an error value from an i2c remove callback results in an error > message being emitted by the i2c core, but otherwise it doesn't make a > difference. The device goes away anyhow and the devm cleanups are > called. > > As lm3697_remove() already emits an error message on failure and the > additional error message by the i2c core doesn't add any useful > information, don't pass the error value up the stack. Instead continue > to clean up and return 0. > > This patch is a preparation for making i2c remove callbacks return void. > > Acked-by: Pavel Machek <pavel@ucw.cz> > Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Applied to an immutable branch, thanks!
> As some conflicts are expected I sent this early after -rc1 such that it > can be included early into next and be put on an immutable branch for > subsystems to resolve merge conflicts. I pushed the series out now, so it should hit -next tomorrow. The immutable branch is here: git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git i2c/make_remove_callback_void-immutable Enjoy!
Hello, as promised there comes the series that does - int (*remove)(struct i2c_client *client); + void (*remove)(struct i2c_client *client); in struct i2c_driver. Returning an error code has no (relevant) effect, as in the Linux device model removal cannot be stopped. So the possibility to return a value is prone to trouble because driver authors might assume it does stop the process and .remove is called again at a later point again. A few errors like these were fixed preparing this change. See commit bbc126ae381c ("usb: typec: tcpci: Don't skip cleanup in .remove() on error") for an example. To prevent such errors in the future, .remove() is changed to return void which leaves no doubt about its semantics. This series is build-tested on arm64, m68k, powerpc, riscv, s390, sparc64 and x86_64 using allmodconfig. As some conflicts are expected I sent this early after -rc1 such that it can be included early into next and be put on an immutable branch for subsystems to resolve merge conflicts. The first 5 patches in this series are preparatory work with the goal that the final patch just drops "return 0" (or changes them to a plain "return"). The three led patches got an Ack by Pavel (= led maintainer), the other two didn't get final maintainer feedback. See https://lore.kernel.org/dri-devel/20220526202538.1723142-1-u.kleine-koenig@pengutronix.de https://lore.kernel.org/linux-gpio/20220502170555.51183-1-u.kleine-koenig@pengutronix.de for the "discussions" about these two. The changes since the first submission were already summarized in https://lore.kernel.org/r/20220811124029.usxahk5nvfgqsm42@pengutronix.de in detail, the only change since then is that the changes to drivers/input/keyboard/adp5588-keys.c were merged, so additionally to the changes described before, the change to that driver was adapted accordingly. To summarize it's just: - The preparing patches (#1 - #5) are unchanged - Remove a comment form drivers/net/mctp/mctp-i2c.c that doesn't match any more in #6. (Noticed by Matt Johnston and independently by Jeremy Kerr) - Removed a stray change to lib/Kconfig.kasan that I needed for build testing but that wasn't ment to be included; also in patch #6. (Noticed by Andrey Ryabinin). - Rebase v5.19-rc4 -> 6.0-rc1 and adapt for dropped and new drivers. The patches are also available at https://git.pengutronix.de/git/ukl/linux i2c-remove-void Thanks Uwe Uwe Kleine-König (6): drm/i2c/sil164: Drop no-op remove function leds: lm3697: Remove duplicated error reporting in .remove() leds: lm3601x: Don't use mutex after it was destroyed leds: lm3601x: Improve error reporting for problems during .remove() gpio: pca953x: Make platform teardown callback return void i2c: Make remove callback return void Documentation/i2c/writing-clients.rst | 2 +- arch/arm/mach-davinci/board-da850-evm.c | 12 ++++-------- arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c | 3 +-- drivers/auxdisplay/ht16k33.c | 4 +--- drivers/auxdisplay/lcd2s.c | 3 +-- drivers/char/ipmi/ipmb_dev_int.c | 4 +--- drivers/char/ipmi/ipmi_ipmb.c | 4 +--- drivers/char/ipmi/ipmi_ssif.c | 6 ++---- drivers/char/tpm/st33zp24/i2c.c | 4 +--- drivers/char/tpm/tpm_i2c_atmel.c | 3 +-- drivers/char/tpm/tpm_i2c_infineon.c | 4 +--- drivers/char/tpm/tpm_i2c_nuvoton.c | 3 +-- drivers/char/tpm/tpm_tis_i2c.c | 3 +-- drivers/char/tpm/tpm_tis_i2c_cr50.c | 6 ++---- drivers/clk/clk-cdce706.c | 3 +-- drivers/clk/clk-cs2000-cp.c | 4 +--- drivers/clk/clk-si514.c | 3 +-- drivers/clk/clk-si5341.c | 4 +--- drivers/clk/clk-si5351.c | 4 +--- drivers/clk/clk-si570.c | 3 +-- drivers/clk/clk-versaclock5.c | 4 +--- drivers/crypto/atmel-ecc.c | 6 ++---- drivers/crypto/atmel-sha204a.c | 6 ++---- drivers/extcon/extcon-rt8973a.c | 4 +--- drivers/gpio/gpio-adp5588.c | 4 +--- drivers/gpio/gpio-max7300.c | 4 +--- drivers/gpio/gpio-pca953x.c | 13 +++---------- drivers/gpio/gpio-pcf857x.c | 4 +--- drivers/gpio/gpio-tpic2810.c | 4 +--- drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 4 +--- drivers/gpu/drm/bridge/analogix/analogix-anx6345.c | 4 +--- drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c | 4 +--- drivers/gpu/drm/bridge/analogix/anx7625.c | 4 +--- drivers/gpu/drm/bridge/chrontel-ch7033.c | 4 +--- drivers/gpu/drm/bridge/cros-ec-anx7688.c | 4 +--- drivers/gpu/drm/bridge/ite-it6505.c | 4 +--- drivers/gpu/drm/bridge/ite-it66121.c | 4 +--- drivers/gpu/drm/bridge/lontium-lt8912b.c | 3 +-- drivers/gpu/drm/bridge/lontium-lt9211.c | 4 +--- drivers/gpu/drm/bridge/lontium-lt9611.c | 4 +--- drivers/gpu/drm/bridge/lontium-lt9611uxc.c | 4 +--- .../drm/bridge/megachips-stdpxxxx-ge-b850v3-fw.c | 8 ++------ drivers/gpu/drm/bridge/nxp-ptn3460.c | 4 +--- drivers/gpu/drm/bridge/parade-ps8622.c | 4 +--- drivers/gpu/drm/bridge/sii902x.c | 4 +--- drivers/gpu/drm/bridge/sii9234.c | 4 +--- drivers/gpu/drm/bridge/sil-sii8620.c | 4 +--- drivers/gpu/drm/bridge/tc358767.c | 4 +--- drivers/gpu/drm/bridge/tc358768.c | 4 +--- drivers/gpu/drm/bridge/tc358775.c | 4 +--- drivers/gpu/drm/bridge/ti-dlpc3433.c | 4 +--- drivers/gpu/drm/bridge/ti-sn65dsi83.c | 4 +--- drivers/gpu/drm/bridge/ti-tfp410.c | 4 +--- drivers/gpu/drm/i2c/ch7006_drv.c | 4 +--- drivers/gpu/drm/i2c/sil164_drv.c | 7 ------- drivers/gpu/drm/i2c/tda9950.c | 4 +--- drivers/gpu/drm/i2c/tda998x_drv.c | 3 +-- drivers/gpu/drm/panel/panel-olimex-lcd-olinuxino.c | 4 +--- .../gpu/drm/panel/panel-raspberrypi-touchscreen.c | 4 +--- drivers/gpu/drm/solomon/ssd130x-i2c.c | 4 +--- drivers/hid/i2c-hid/i2c-hid-core.c | 4 +--- drivers/hid/i2c-hid/i2c-hid.h | 2 +- drivers/hwmon/adc128d818.c | 4 +--- drivers/hwmon/adt7470.c | 3 +-- drivers/hwmon/asb100.c | 6 ++---- drivers/hwmon/asc7621.c | 4 +--- drivers/hwmon/dme1737.c | 4 +--- drivers/hwmon/f75375s.c | 5 ++--- drivers/hwmon/fschmd.c | 6 ++---- drivers/hwmon/ftsteutates.c | 3 +-- drivers/hwmon/ina209.c | 4 +--- drivers/hwmon/ina3221.c | 4 +--- drivers/hwmon/jc42.c | 3 +-- drivers/hwmon/occ/p8_i2c.c | 4 +--- drivers/hwmon/pcf8591.c | 3 +-- drivers/hwmon/smm665.c | 3 +-- drivers/hwmon/tps23861.c | 4 +--- drivers/hwmon/w83781d.c | 4 +--- drivers/hwmon/w83791d.c | 6 ++---- drivers/hwmon/w83792d.c | 6 ++---- drivers/hwmon/w83793.c | 6 ++---- drivers/hwmon/w83795.c | 4 +--- drivers/hwmon/w83l785ts.c | 6 ++---- drivers/i2c/i2c-core-base.c | 6 +----- drivers/i2c/i2c-slave-eeprom.c | 4 +--- drivers/i2c/i2c-slave-testunit.c | 3 +-- drivers/i2c/i2c-smbus.c | 3 +-- drivers/i2c/muxes/i2c-mux-ltc4306.c | 4 +--- drivers/i2c/muxes/i2c-mux-pca9541.c | 3 +-- drivers/i2c/muxes/i2c-mux-pca954x.c | 3 +-- drivers/iio/accel/bma180.c | 4 +--- drivers/iio/accel/bmc150-accel-i2c.c | 4 +--- drivers/iio/accel/kxcjk-1013.c | 4 +--- drivers/iio/accel/kxsd9-i2c.c | 4 +--- drivers/iio/accel/mc3230.c | 4 +--- drivers/iio/accel/mma7455_i2c.c | 4 +--- drivers/iio/accel/mma7660.c | 4 +--- drivers/iio/accel/mma8452.c | 4 +--- drivers/iio/accel/mma9551.c | 4 +--- drivers/iio/accel/mma9553.c | 4 +--- drivers/iio/accel/stk8312.c | 4 +--- drivers/iio/accel/stk8ba50.c | 4 +--- drivers/iio/adc/ad799x.c | 4 +--- drivers/iio/adc/ina2xx-adc.c | 4 +--- drivers/iio/adc/ltc2497.c | 4 +--- drivers/iio/adc/ti-ads1015.c | 4 +--- drivers/iio/chemical/atlas-sensor.c | 4 +--- drivers/iio/chemical/ccs811.c | 4 +--- drivers/iio/chemical/sgp30.c | 4 +--- drivers/iio/dac/ad5380.c | 4 +--- drivers/iio/dac/ad5446.c | 4 +--- drivers/iio/dac/ad5593r.c | 4 +--- drivers/iio/dac/ad5696-i2c.c | 4 +--- drivers/iio/dac/ds4424.c | 4 +--- drivers/iio/dac/m62332.c | 4 +--- drivers/iio/dac/mcp4725.c | 4 +--- drivers/iio/dac/ti-dac5571.c | 4 +--- drivers/iio/gyro/bmg160_i2c.c | 4 +--- drivers/iio/gyro/fxas21002c_i2c.c | 4 +--- drivers/iio/gyro/itg3200_core.c | 4 +--- drivers/iio/gyro/mpu3050-i2c.c | 4 +--- drivers/iio/health/afe4404.c | 4 +--- drivers/iio/health/max30100.c | 4 +--- drivers/iio/health/max30102.c | 4 +--- drivers/iio/humidity/hdc2010.c | 4 +--- drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c | 4 +--- drivers/iio/imu/kmx61.c | 4 +--- drivers/iio/light/apds9300.c | 4 +--- drivers/iio/light/apds9960.c | 4 +--- drivers/iio/light/bh1750.c | 4 +--- drivers/iio/light/bh1780.c | 4 +--- drivers/iio/light/cm3232.c | 4 +--- drivers/iio/light/cm36651.c | 4 +--- drivers/iio/light/gp2ap002.c | 4 +--- 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4 +--- drivers/iio/pressure/ms5611_i2c.c | 4 +--- drivers/iio/pressure/zpa2326_i2c.c | 4 +--- drivers/iio/proximity/pulsedlight-lidar-lite-v2.c | 4 +--- drivers/iio/proximity/sx9500.c | 4 +--- drivers/iio/temperature/mlx90614.c | 4 +--- drivers/iio/temperature/mlx90632.c | 4 +--- drivers/input/joystick/as5011.c | 4 +--- drivers/input/keyboard/adp5588-keys.c | 3 +-- drivers/input/keyboard/lm8323.c | 4 +--- drivers/input/keyboard/lm8333.c | 4 +--- drivers/input/keyboard/mcs_touchkey.c | 4 +--- drivers/input/keyboard/qt1070.c | 4 +--- drivers/input/keyboard/qt2160.c | 4 +--- drivers/input/keyboard/tca6416-keypad.c | 4 +--- drivers/input/misc/adxl34x-i2c.c | 4 +--- drivers/input/misc/bma150.c | 4 +--- drivers/input/misc/cma3000_d0x_i2c.c | 4 +--- drivers/input/misc/pcf8574_keypad.c | 4 +--- drivers/input/mouse/synaptics_i2c.c | 4 +--- drivers/input/rmi4/rmi_smbus.c | 4 +--- drivers/input/touchscreen/atmel_mxt_ts.c | 4 +--- drivers/input/touchscreen/bu21013_ts.c | 4 +--- 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drivers/media/dvb-frontends/cxd2820r_core.c | 4 +--- drivers/media/dvb-frontends/dvb-pll.c | 3 +-- drivers/media/dvb-frontends/lgdt3306a.c | 4 +--- drivers/media/dvb-frontends/lgdt330x.c | 4 +--- drivers/media/dvb-frontends/m88ds3103.c | 3 +-- drivers/media/dvb-frontends/mn88443x.c | 4 +--- drivers/media/dvb-frontends/mn88472.c | 4 +--- drivers/media/dvb-frontends/mn88473.c | 4 +--- drivers/media/dvb-frontends/mxl692.c | 4 +--- drivers/media/dvb-frontends/rtl2830.c | 4 +--- drivers/media/dvb-frontends/rtl2832.c | 4 +--- drivers/media/dvb-frontends/si2165.c | 3 +-- drivers/media/dvb-frontends/si2168.c | 4 +--- drivers/media/dvb-frontends/sp2.c | 3 +-- drivers/media/dvb-frontends/stv090x.c | 3 +-- drivers/media/dvb-frontends/stv6110x.c | 3 +-- drivers/media/dvb-frontends/tc90522.c | 3 +-- drivers/media/dvb-frontends/tda10071.c | 3 +-- drivers/media/dvb-frontends/ts2020.c | 3 +-- drivers/media/i2c/ad5820.c | 3 +-- drivers/media/i2c/ad9389b.c | 3 +-- drivers/media/i2c/adp1653.c | 4 +--- 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drivers/net/dsa/lan9303_i2c.c | 6 ++---- drivers/net/dsa/microchip/ksz9477_i2c.c | 4 +--- drivers/net/dsa/xrs700x/xrs700x_i2c.c | 6 ++---- drivers/net/ethernet/mellanox/mlxsw/i2c.c | 4 +--- drivers/net/mctp/mctp-i2c.c | 4 +--- drivers/nfc/fdp/i2c.c | 4 +--- drivers/nfc/microread/i2c.c | 4 +--- drivers/nfc/nfcmrvl/i2c.c | 4 +--- drivers/nfc/nxp-nci/i2c.c | 4 +--- drivers/nfc/pn533/i2c.c | 4 +--- drivers/nfc/pn544/i2c.c | 4 +--- drivers/nfc/s3fwrn5/i2c.c | 4 +--- drivers/nfc/st-nci/i2c.c | 4 +--- drivers/nfc/st21nfca/i2c.c | 4 +--- drivers/of/unittest.c | 6 ++---- drivers/platform/chrome/cros_ec_i2c.c | 4 +--- drivers/platform/surface/surface3_power.c | 4 +--- drivers/platform/x86/asus-tf103c-dock.c | 4 +--- drivers/platform/x86/intel/int3472/tps68470.c | 4 +--- drivers/power/supply/bq2415x_charger.c | 4 +--- drivers/power/supply/bq24190_charger.c | 4 +--- drivers/power/supply/bq24257_charger.c | 4 +--- drivers/power/supply/bq25890_charger.c | 4 +--- drivers/power/supply/bq27xxx_battery_i2c.c | 4 +--- drivers/power/supply/cw2015_battery.c | 3 +-- drivers/power/supply/ds2782_battery.c | 4 +--- drivers/power/supply/lp8727_charger.c | 3 +-- drivers/power/supply/rt5033_battery.c | 4 +--- drivers/power/supply/rt9455_charger.c | 4 +--- drivers/power/supply/smb347-charger.c | 4 +--- drivers/power/supply/z2_battery.c | 4 +--- drivers/pwm/pwm-pca9685.c | 4 +--- drivers/regulator/da9121-regulator.c | 3 +-- drivers/regulator/lp8755.c | 4 +--- drivers/regulator/rpi-panel-attiny-regulator.c | 4 +--- drivers/rtc/rtc-bq32k.c | 4 +--- drivers/rtc/rtc-ds1374.c | 4 +--- drivers/rtc/rtc-isl12026.c | 3 +-- drivers/rtc/rtc-m41t80.c | 4 +--- drivers/rtc/rtc-rs5c372.c | 3 +-- drivers/rtc/rtc-x1205.c | 3 +-- drivers/staging/media/atomisp/i2c/atomisp-gc0310.c | 4 +--- drivers/staging/media/atomisp/i2c/atomisp-gc2235.c | 4 +--- drivers/staging/media/atomisp/i2c/atomisp-lm3554.c | 4 +--- drivers/staging/media/atomisp/i2c/atomisp-mt9m114.c | 3 +-- drivers/staging/media/atomisp/i2c/atomisp-ov2680.c | 4 +--- drivers/staging/media/atomisp/i2c/atomisp-ov2722.c | 4 +--- .../media/atomisp/i2c/ov5693/atomisp-ov5693.c | 4 +--- drivers/staging/media/max96712/max96712.c | 4 +--- drivers/staging/most/i2c/i2c.c | 4 +--- drivers/staging/olpc_dcon/olpc_dcon.c | 4 +--- drivers/tty/serial/max310x.c | 4 +--- drivers/tty/serial/sc16is7xx.c | 4 +--- drivers/usb/misc/usb3503.c | 4 +--- drivers/usb/phy/phy-isp1301-omap.c | 4 +--- drivers/usb/phy/phy-isp1301.c | 4 +--- drivers/usb/typec/anx7411.c | 4 +--- drivers/usb/typec/hd3ss3220.c | 4 +--- drivers/usb/typec/mux/fsa4480.c | 4 +--- drivers/usb/typec/mux/pi3usb30532.c | 3 +-- drivers/usb/typec/rt1719.c | 4 +--- drivers/usb/typec/stusb160x.c | 4 +--- drivers/usb/typec/tcpm/fusb302.c | 4 +--- drivers/usb/typec/tcpm/tcpci.c | 4 +--- drivers/usb/typec/tcpm/tcpci_maxim.c | 4 +--- drivers/usb/typec/tcpm/tcpci_rt1711h.c | 3 +-- drivers/usb/typec/tipd/core.c | 4 +--- drivers/usb/typec/ucsi/ucsi_ccg.c | 4 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sound/soc/codecs/ak4458.c | 4 +--- sound/soc/codecs/ak4641.c | 4 +--- sound/soc/codecs/ak5558.c | 4 +--- sound/soc/codecs/cs35l32.c | 4 +--- sound/soc/codecs/cs35l33.c | 4 +--- sound/soc/codecs/cs35l34.c | 4 +--- sound/soc/codecs/cs35l35.c | 4 +--- sound/soc/codecs/cs35l36.c | 4 +--- sound/soc/codecs/cs35l41-i2c.c | 4 +--- sound/soc/codecs/cs35l45-i2c.c | 4 +--- sound/soc/codecs/cs4234.c | 4 +--- sound/soc/codecs/cs4265.c | 4 +--- sound/soc/codecs/cs4270.c | 4 +--- sound/soc/codecs/cs42l42.c | 4 +--- sound/soc/codecs/cs42l51-i2c.c | 4 +--- sound/soc/codecs/cs42l56.c | 3 +-- sound/soc/codecs/cs42xx8-i2c.c | 4 +--- sound/soc/codecs/cs43130.c | 4 +--- sound/soc/codecs/cs4349.c | 4 +--- sound/soc/codecs/cs53l30.c | 4 +--- sound/soc/codecs/cx2072x.c | 3 +-- sound/soc/codecs/max98090.c | 4 +--- sound/soc/codecs/max9860.c | 3 +-- sound/soc/codecs/max98927.c | 4 +--- sound/soc/codecs/mt6660.c | 3 +-- sound/soc/codecs/nau8825.c | 6 ++---- sound/soc/codecs/pcm1789-i2c.c | 4 +--- sound/soc/codecs/pcm3168a-i2c.c | 4 +--- sound/soc/codecs/pcm512x-i2c.c | 3 +-- sound/soc/codecs/rt274.c | 4 +--- sound/soc/codecs/rt286.c | 4 +--- sound/soc/codecs/rt298.c | 4 +--- sound/soc/codecs/rt5616.c | 6 ++---- sound/soc/codecs/rt5631.c | 6 ++---- sound/soc/codecs/rt5645.c | 4 +--- sound/soc/codecs/rt5663.c | 4 +--- sound/soc/codecs/rt5670.c | 4 +--- sound/soc/codecs/rt5677.c | 4 +--- sound/soc/codecs/rt5682-i2c.c | 4 +--- sound/soc/codecs/rt5682s.c | 4 +--- sound/soc/codecs/rt9120.c | 3 +-- sound/soc/codecs/sgtl5000.c | 4 +--- sound/soc/codecs/sta350.c | 6 ++---- sound/soc/codecs/tas2552.c | 3 +-- sound/soc/codecs/tas5086.c | 6 ++---- sound/soc/codecs/tas571x.c | 4 +--- sound/soc/codecs/tas5805m.c | 3 +-- sound/soc/codecs/tas6424.c | 4 +--- sound/soc/codecs/tlv320adc3xxx.c | 3 +-- sound/soc/codecs/tlv320aic32x4-i2c.c | 4 +--- sound/soc/codecs/tlv320aic3x-i2c.c | 4 +--- sound/soc/codecs/tlv320dac33.c | 4 +--- sound/soc/codecs/wm1250-ev1.c | 4 +--- sound/soc/codecs/wm2200.c | 4 +--- sound/soc/codecs/wm5100.c | 4 +--- sound/soc/codecs/wm8804-i2c.c | 3 +-- sound/soc/codecs/wm8900.c | 6 ++---- sound/soc/codecs/wm8903.c | 4 +--- sound/soc/codecs/wm8960.c | 6 ++---- sound/soc/codecs/wm8962.c | 3 +-- sound/soc/codecs/wm8993.c | 4 +--- sound/soc/codecs/wm8996.c | 4 +--- sound/soc/codecs/wm9081.c | 6 ++---- 622 files changed, 660 insertions(+), 1762 deletions(-) base-commit: 568035b01cfb107af8d2e4bd2fb9aea22cf5b868