gpiolib: cdev: Cleanup kfifo_out() error handling

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The handling of kfifo_out() errors in read functions obscures any error.
The error condition should never occur but, while a ret is set to -EIO, it
is subsequently ignored and the read functions instead return the number
of bytes copied to that point, potentially masking the fact that any error
occurred.

Log a warning and return -EIO in the case of a kfifo_out() error to make
it clear something very odd is going on here.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Link: https://lore.kernel.org/r/20240529131953.195777-4-warthog618@gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

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Kent Gibson 2024-05-29 21:19:53 +08:00 • committed by Bartosz Golaszewski

parent 4ce5ca654a

commit 2ba4746b41

1 changed files with 27 additions and 26 deletions

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drivers/gpio/gpiolib-cdev.c

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