scsi: ibmvscsis: Synchronize cmds at tpg_enable_store time
authorMichael Cyr <mikecyr@us.ibm.com>
Thu, 13 Oct 2016 16:02:39 +0000 (11:02 -0500)
committerMartin K. Petersen <martin.petersen@oracle.com>
Tue, 8 Nov 2016 22:29:54 +0000 (17:29 -0500)
commitc9b3379f60a83288a5e2f8ea75476460978689b0
tree261ddf68c699523789aa37b6e65945fd31bd4551
parent79fac9c9b74f4951c9ce82b22e714bcc34ae4a56
scsi: ibmvscsis: Synchronize cmds at tpg_enable_store time

This patch changes the way the IBM vSCSI server driver manages its
Command/Response Queue (CRQ).  We used to register the CRQ with phyp at
probe time.  Now we wait until tpg_enable_store.  Similarly, when
tpg_enable_store is called to "disable" (i.e. the stored value is 0),
we unregister the queue with phyp.

One consquence to this is that we have no need for the PART_UP_WAIT_ENAB
state, since we can't get an Init Message from the client in our CRQ if
we're waiting to be enabled, since we haven't registered the queue yet.

Signed-off-by: Michael Cyr <mikecyr@us.ibm.com>
Signed-off-by: Bryant G. Ly <bryantly@linux.vnet.ibm.com>
Tested-by: Steven Royer <seroyer@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.h