libiscsi: fix locking in iscsi_eh_device_reset
We must be using the bh spin locking functions in
iscsi_eh_device_reset becuase the session lock interacts with
a thread and softirq.
This patch also fixes up a bogus comment and check in fail_command,
because no one drops the lock (bnx2i did but it is not going
upstream yet and there were other refcount changes for that).
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index 5aa0db1..801c7cf 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -404,11 +404,6 @@
conn->session->queued_cmdsn--;
else
conn->session->tt->cleanup_task(conn, task);
- /*
- * Check if cleanup_task dropped the lock and the command completed,
- */
- if (!task->sc)
- return;
sc->result = err;
if (!scsi_bidi_cmnd(sc))
@@ -1829,10 +1824,10 @@
iscsi_suspend_tx(conn);
- spin_lock(&session->lock);
+ spin_lock_bh(&session->lock);
fail_all_commands(conn, sc->device->lun, DID_ERROR);
conn->tmf_state = TMF_INITIAL;
- spin_unlock(&session->lock);
+ spin_unlock_bh(&session->lock);
iscsi_start_tx(conn);
goto done;