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pc-bios/s390-ccw: enable subchannel for IPL I/O devices
IPL should cause the IPL I/O device to become enabled. So when handling the IPL program, we should set the E (Enable) bit. However, virtio-ccw does not know whether it's dealing with an IPL device or not. Since trying to perform I/O on a disabled device doesn't make any sense, let's just always enable it. At the same time we can remove the SCSW_FCTL_START_FUNC flag as it is ignored for msch anyway and did not enable the device as intended. Reported-by: Farhan Ali <alifm@linux.vnet.ibm.com> Signed-off-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Sascha Silbe <silbe@linux.vnet.ibm.com> Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com> [remove superfluous flag] Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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