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Francesco Dolcini fed99212ac treewide, serdev: change receive_buf() return type to size_t 
receive_buf() is called from ttyport_receive_buf() that expects values
">= 0" from serdev_controller_receive_buf(), change its return type from
ssize_t to size_t.

The need for this clean-up was noticed while fixing a warning, see
commit 94d0539425 ("Bluetooth: btnxpuart: fix recv_buf() return value").
Changing the callback prototype to return an unsigned seems the best way
to document the API and ensure that is properly used.

GNSS drivers implementation of serdev receive_buf() callback return
directly the return value of gnss_insert_raw(). gnss_insert_raw()
returns a signed int, however this is not an issue since the value
returned is always positive, because of the kfifo_in() implementation.
gnss_insert_raw() could be changed to return also an unsigned, however
this is not implemented here as request by the GNSS maintainer Johan
Hovold.

Suggested-by: Jiri Slaby <jirislaby@kernel.org>
Link: https://lore.kernel.org/all/087be419-ec6b-47ad-851a-5e1e3ea5cfcc@kernel.org/
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> #for-iio
Reviewed-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Acked-by: Maximilian Luz <luzmaximilian@gmail.com>  # for platform/surface
Acked-by: Lee Jones <lee@kernel.org>
Acked-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20240122180551.34429-1-francesco@dolcini.it
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2024-01-27 18:13:53 -08:00
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Kconfig
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Makefile
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ags02ma.c
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ams-iaq-core.c
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atlas-ezo-sensor.c
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atlas-sensor.c
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bme680.h
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bme680_core.c
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bme680_i2c.c
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bme680_spi.c
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ccs811.c
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pms7003.c treewide, serdev: change receive_buf() return type to size_t 2024-01-27 18:13:53 -08:00
scd4x.c
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scd30.h
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scd30_core.c
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scd30_i2c.c
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scd30_serial.c treewide, serdev: change receive_buf() return type to size_t 2024-01-27 18:13:53 -08:00
sgp30.c
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sgp40.c
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sps30.c
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sps30.h
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sps30_i2c.c
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sps30_serial.c treewide, serdev: change receive_buf() return type to size_t 2024-01-27 18:13:53 -08:00
sunrise_co2.c
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vz89x.c
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