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authorBart Van Assche <bvanassche@acm.org>2014-07-09 17:56:43 +0400
committerRoland Dreier <roland@purestorage.com>2014-08-02 02:21:51 +0400
commitcd53eb686d2418eda938aad3c9da42b7dfa9351f (patch)
tree8b6ae868a168996350431b6d1e8cd648f7739ddd /drivers/scsi/scsi_transport_srp.c
parent64aa90f26c06e1cb2aacfb98a7d0eccfbd6c1a91 (diff)
downloadlinux-cd53eb686d2418eda938aad3c9da42b7dfa9351f.tar.xz
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>
Diffstat (limited to 'drivers/scsi/scsi_transport_srp.c')
-rw-r--r--drivers/scsi/scsi_transport_srp.c3
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);