0c9f9992bc1caa1bb890bd8163361dbf2eefa86
author Sebastian Ott <sebott@linux.vnet.ibm.com> 1238077454 +0100
committer Martin Schwidefsky <schwidefsky@de.ibm.com> 1238077455 +0100

[S390] cio: fix sanity checks in ccwgroup driver.

Some sanity checks in the ccw group driver test the output of
container_of macros to be !NULL. Test the input parameters instead.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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