[SCSI] lpfc driver 8.0.30 : dev_loss and nodev timeouts

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Fix handling of the dev_loss and nodev timeouts.

Symptoms: when remote port disappears for a period of time longer then
either nodev_tmo or dev_loss_tmo, the lpfc driver worker thread will
stall removing that remote port.

Cause: removing remote port involves un-blocking and sync-ing
corresponding block device queue. But corresponding node in the lpfc
driver is still in the NPR(?node port recovery?) state and mid-layer
gets SCSI_MLQUEUE_HOST_BUSY as a return value when it is trying to call
queuecommand() with command for that node (AKA remote port)

Fix: Instead of returning SCSI_MLQUEUE_HOST_BUS from queuecommand() for
nodes in NPR states complete it with retry-able error code  DID_BUS_BUSY

Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

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James.Smart@Emulex.Com 2005-08-10 15:02:30 -04:00 • committed by James Bottomley

parent f888ba3ce7

commit ea84c3f74d

1 changed files with 4 additions and 0 deletions

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drivers/scsi/lpfc/lpfc_scsi.c

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