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| author | Bart Van Assche <bvanassche@acm.org> | 2014-07-09 15:56:43 +0200 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2014-08-01 15:21:51 -0700 |
| commit | cd53eb686d2418eda938aad3c9da42b7dfa9351f (patch) | |
| tree | 8b6ae868a168996350431b6d1e8cd648f7739ddd | |
| parent | 64aa90f26c06e1cb2aacfb98a7d0eccfbd6c1a91 (diff) | |
| download | blackbird-obmc-linux-cd53eb686d2418eda938aad3c9da42b7dfa9351f.tar.gz blackbird-obmc-linux-cd53eb686d2418eda938aad3c9da42b7dfa9351f.zip | |
scsi_transport_srp: Fix fast_io_fail_tmo=dev_loss_tmo=off behavior
If scsi_remove_host() is called while an rport is in the blocked state
then scsi_remove_host() will only finish if the rport is unblocked
from inside a timer function. Make sure that an rport only enters the
blocked state if a timer will be started that will unblock it. This
avoids that unloading the ib_srp kernel module after having
disconnected the initiator from the target system results in a
deadlock if both the fast_io_fail_tmo and dev_loss_tmo parameters have
been set to "off".
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Reviewed-by: David Dillow <dave@thedillows.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
| -rw-r--r-- | drivers/scsi/scsi_transport_srp.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/scsi/scsi_transport_srp.c b/drivers/scsi/scsi_transport_srp.c index 13e898332e45..a0c5bfdc5366 100644 --- a/drivers/scsi/scsi_transport_srp.c +++ b/drivers/scsi/scsi_transport_srp.c @@ -473,7 +473,8 @@ static void __srp_start_tl_fail_timers(struct srp_rport *rport) if (delay > 0) queue_delayed_work(system_long_wq, &rport->reconnect_work, 1UL * delay * HZ); - if (srp_rport_set_state(rport, SRP_RPORT_BLOCKED) == 0) { + if ((fast_io_fail_tmo >= 0 || dev_loss_tmo >= 0) && + srp_rport_set_state(rport, SRP_RPORT_BLOCKED) == 0) { pr_debug("%s new state: %d\n", dev_name(&shost->shost_gendev), rport->state); scsi_target_block(&shost->shost_gendev); |
