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[S390] Fix smsgiucv init on no iucv machines

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smsgiucv is a driver that relies on iucv to work properly. If
iucv ans smsgiucv are compiled into the kernel and run on an
lpar the following scenario happens:
iucv is initialized early as a subsystem. It checks for z/VM and
returns with EPROTONOTSUPPORT. Later smsgiucv tries to run
driver_register with iucv_bus as bus. As this bus is not
initialized the driver core and list debugging issue several
warnings and oopses.

Solution is to let smsgiucv also check for z/VM and return
EPROTONOTSUPPORT as well.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Christian Borntraeger 2007-11-05 11:10:08 +01:00 committed by Martin Schwidefsky
parent 33583c3657
commit 0fc3ddd67a
1 changed files with 4 additions and 0 deletions
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4
drivers/s390/net/smsgiucv.c
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@ -148,6 +148,10 @@ static int __init smsg_init(void)
{
int rc;
if (!MACHINE_IS_VM) {
rc = -EPROTONOSUPPORT;
goto out;
}
rc = driver_register(&smsg_driver);
if (rc != 0)
goto out;