target/pscsi: Don't leak scsi_host if hba is VIRTUAL_HOST

See https://bugzilla.redhat.com/show_bug.cgi?id=1025672

We need to put() the reference to the scsi host that we got in
pscsi_configure_device(). In VIRTUAL_HOST mode it is associated with
the dev_virt, not the hba_virt.

Signed-off-by: Andy Grover <agrover@redhat.com>
Cc: stable@vger.kernel.org # 2.6.38+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
index f6c954c4635f5dab27ac24ea117dd284561c836a..4073869d209024ae2b500f590e34066f964566cf 100644 (file)
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -521,6 +521,7 @@ static int pscsi_configure_device(struct se_device *dev)
                                        " pdv_host_id: %d\n", pdv->pdv_host_id);
                                return -EINVAL;
                        }
+                       pdv->pdv_lld_host = sh;
                }
        } else {
                if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) {
@@ -603,6 +604,8 @@ static void pscsi_free_device(struct se_device *dev)
                if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) &&
                    (phv->phv_lld_host != NULL))
                        scsi_host_put(phv->phv_lld_host);
+               else if (pdv->pdv_lld_host)
+                       scsi_host_put(pdv->pdv_lld_host);
 
                if ((sd->type == TYPE_DISK) || (sd->type == TYPE_ROM))
                        scsi_device_put(sd);

diff --git a/drivers/target/target_core_pscsi.h b/drivers/target/target_core_pscsi.h
index 1bd757dff8eee3806cae1d3da6ce33804e5deb17..820d3052b775caf438912d703402ebb4172d7f31 100644 (file)
--- a/drivers/target/target_core_pscsi.h
+++ b/drivers/target/target_core_pscsi.h
@@ -45,6 +45,7 @@ struct pscsi_dev_virt {
        int     pdv_lun_id;
        struct block_device *pdv_bd;
        struct scsi_device *pdv_sd;
+       struct Scsi_Host *pdv_lld_host;
 } ____cacheline_aligned;
 
 typedef enum phv_modes {