Commit 0fc3ddd6 authored Nov 05, 2007 by Christian Borntraeger Committed by Martin Schwidefsky Nov 05, 2007

[S390] Fix smsgiucv init on no iucv machines



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>

parent 33583c36

drivers/s390/net/smsgiucv.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -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;