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IB/srp: Fix crash in srp_reconnect_target

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Protect against srp_reset_device() clearing the req_queue while
srp_reconnect_target() is in progress (note that state change at
the top of srp_reconnect_target() is not sufficient for this since
srp_reset_device() ignores the state).

Signed-off-by: Ishai Rabinovitz <ishai@mellanox.co.il>
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Ishai Rabinovitz 2006-07-25 19:54:09 +03:00 committed by Roland Dreier
parent 75df23e229
commit d916a8f1b4
1 changed files with 2 additions and 0 deletions
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drivers/infiniband/ulp/srp/ib_srp.c
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@ -526,8 +526,10 @@ static int srp_reconnect_target(struct srp_target_port *target)
while (ib_poll_cq(target->cq, 1, &wc) > 0)
; /* nothing */
spin_lock_irq(target->scsi_host->host_lock);
list_for_each_entry_safe(req, tmp, &target->req_queue, list)
srp_reset_req(target, req);
spin_unlock_irq(target->scsi_host->host_lock);
target->rx_head = 0;
target->tx_head = 0;