6566278 Panic when ibd is configured after HCA is unconfigured and configured

6727497 IB nexus should create one pathinfo node per HCA per IB nexus child
6726179 ls -l /devices/ib shows zero devices nodes after doing rem_drv and add_drv of HCA driver
6368026 IOC enumeration issues in multi HCA system
6745259 Calling ddi_remove_minor_node in async thread causes deadlock
6500304 RDS: Support HCA DR
6739584 The 'cfgadm -x list_clients' command has a display problem
6739581 The output of 'cfgadm -x unconfig_clients' command doesn't display the HCA ap_id correctly
6759972 ibmf_unregister() returned busy during HCA unconfigure operation
6754808 IB Stack should recover from HCA unconfigure failures
6725241 ibdm_handle_hca_detach() should update ibdm.ibdm_hca_list_tail pointer
6751608 panic when configuring an IB HCA child
6607950 raise IB port settling time

1 files changed, 14 insertions, 1 deletions

diff --git a/usr/src/uts/common/os/sunmdi.c b/usr/src/uts/common/os/sunmdi.c
index d2af7a3c03..42b0a9025e 100644
--- a/usr/src/uts/common/os/sunmdi.c
+++ b/usr/src/uts/common/os/sunmdi.c
@@ -375,7 +375,20 @@ mdi_vhci_register(char *class, dev_info_t *vdip, mdi_vhci_ops_t *vops,
 	mdi_vhci_t		*vh = NULL;
 
 	ASSERT(vops->vo_revision == MDI_VHCI_OPS_REV);
-	ASSERT(DEVI_BUSY_OWNED(ddi_get_parent(vdip)));
+#ifdef DEBUG
+	/*
+	 * IB nexus driver is loaded only when IB hardware is present.
+	 * In order to be able to do this there is a need to drive the loading
+	 * and attaching of the IB nexus driver (especially when an IB hardware
+	 * is dynamically plugged in) when an IB HCA driver (PHCI)
+	 * is being attached. Unfortunately this gets into the limitations
+	 * of devfs as there seems to be no clean way to drive configuration
+	 * of a subtree from another subtree of a devfs. Hence, do not ASSERT
+	 * for IB.
+	 */
+	if (strcmp(class, MDI_HCI_CLASS_IB) != 0)
+		ASSERT(DEVI_BUSY_OWNED(ddi_get_parent(vdip)));
+#endif
 
 	i_mdi_init();