tree 2ee2ad225c7e4850a30bc57c4bf07251c1da1085
parent 6ea438ec8da4ec56bf415f5ea360e6b0cb59c6c3
author David Brownell <david-b@pacbell.net> 1216067905 +0200
committer Jean Delvare <khali@mahadeva.delvare> 1216067905 +0200

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>