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Date: Mon, 15 Sep 2014 12:24:56 -0700 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Bart Van Assche <bvanassche@....org>, Sagi Grimberg <sagig@...lanox.com>, David Dillow <dave@...dillows.org>, Roland Dreier <roland@...estorage.com> Subject: [PATCH 3.16 057/158] scsi_transport_srp: Fix fast_io_fail_tmo=dev_loss_tmo=off behavior 3.16-stable review patch. If anyone has any objections, please let me know. ------------------ From: Bart Van Assche <bvanassche@....org> commit cd53eb686d2418eda938aad3c9da42b7dfa9351f upstream. 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@....org> Reviewed-by: Sagi Grimberg <sagig@...lanox.com> Reviewed-by: David Dillow <dave@...dillows.org> Signed-off-by: Roland Dreier <roland@...estorage.com> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/scsi/scsi_transport_srp.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- 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(s 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); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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