[PATCH 01/08] IB/srp: Don't send task management commands after target removal

[Greg KH <gregkh@suse.de>]

From: Roland Dreier <rdreier@cisco.com>

Just fail abort and reset requests that come in after we've already
decided to remove a target.  This fixes a nasty crash if a storage
target goes away.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

This is upstream in Linus's tree as 1285b3a0b0aa2391ac6f6939e6737203c8220f68

 drivers/infiniband/ulp/srp/ib_srp.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- linux-2.6.15.6.orig/drivers/infiniband/ulp/srp/ib_srp.c
+++ linux-2.6.15.6/drivers/infiniband/ulp/srp/ib_srp.c
@@ -1154,6 +1154,12 @@ static int srp_send_tsk_mgmt(struct scsi
 
 	spin_lock_irq(target->scsi_host->host_lock);
 
+	if (target->state == SRP_TARGET_DEAD ||
+	    target->state == SRP_TARGET_REMOVED) {
+		scmnd->result = DID_BAD_TARGET << 16;
+		goto out;
+	}
+
 	if (scmnd->host_scribble == (void *) -1L)
 		goto out;
 
-
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