David Brownell 97140342e6
i2c: Bus drivers return -Errno not -1 ...
Tighten error paths used by various i2c adapters (mostly x86) so
they return real fault/errno codes instead of a "-1" (which is
most often interpreted as "-EPERM"). Build tested, with eyeball
review.
One minor initial goal is to have adapters consistently return
the code "-ENXIO" when addressing a device doesn't get an ACK
response, at least in the probe paths where they are already
good at stifling related logspam.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net >
Signed-off-by: Jean Delvare <khali@linux-fr.org >
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David Brownell
97140342e6