[SCSI] mpt2sas: Added -ENOMEM return type when allocation fails

In the driver mpt2sas_base_attach subroutine, we need to add
support to return the proper error code when there are memory allocation
failures, e.g. returning -ENOMEM.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

drivers/scsi/mpt2sas/mpt2sas_base.c

@@ -3634,8 +3634,10 @@ mpt2sas_base_attach(struct MPT2SAS_ADAPTER *ioc)
 		ioc->pd_handles_sz++;
 	ioc->pd_handles = kzalloc(ioc->pd_handles_sz,
 	    GFP_KERNEL);
-	if (!ioc->pd_handles)
+	if (!ioc->pd_handles) {
+		r = -ENOMEM;
 		goto out_free_resources;
+	}
 
 	ioc->fwfault_debug = mpt2sas_fwfault_debug;
 
@@ -3676,6 +3678,13 @@ mpt2sas_base_attach(struct MPT2SAS_ADAPTER *ioc)
 		goto out_free_resources;
 	}
 
+	if (!ioc->base_cmds.reply || !ioc->transport_cmds.reply ||
+	    !ioc->scsih_cmds.reply || !ioc->tm_cmds.reply ||
+	    !ioc->config_cmds.reply || !ioc->ctl_cmds.reply) {
+		r = -ENOMEM;
+		goto out_free_resources;
+	}
+
 	init_completion(&ioc->shost_recovery_done);
 
 	for (i = 0; i < MPI2_EVENT_NOTIFY_EVENTMASK_WORDS; i++)