tree 406b09500a13eaf91f2f8a925e76db40f450a712
parent 7c15fd1249658e203b2ac8661e48da6c2102e563
author David Brownell <dbrownell@users.sourceforge.net> 1223998205 +0200
committer Jean Delvare <khali@mahadeva.delvare> 1223998205 +0200

i2c: Guard against oopses from bad init sequences

Guard I2C against oopsing because of init sequence problems, by
verifying that i2c_init() has been called before calling any
routines that rely on that initialization.  This specific test
just requires that bus_register(&i2c_bus_type) was called.

Examples of this kind of oopsing come from subystems and drivers
which register I2C drivers in their subsys_initcall code but
which are statically linked before I2C by drivers/Makefile.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>