From 1796e72291b2b6aafaec5954e666d0b5a95da935 Mon Sep 17 00:00:00 2001 From: Mike Christie Date: Wed, 11 Nov 2009 16:34:36 -0600 Subject: [SCSI] libiscsi: hook into ramp up/down handling It is rare to get a queue full with iscsi, because targets seem to just reduce the iscsi cmd window. However, there is at least one iscsi target that will throw a queue full when overloaded. This hooks the iscsi code in to the ramp up/down code, so we can handle it. Signed-off-by: Mike Christie Signed-off-by: James Bottomley --- drivers/scsi/libiscsi.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index 07ec997c5d4f..b7689f3d05f5 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -1739,10 +1739,19 @@ EXPORT_SYMBOL_GPL(iscsi_queuecommand); int iscsi_change_queue_depth(struct scsi_device *sdev, int depth, int reason) { - if (reason != SCSI_QDEPTH_DEFAULT) + switch (reason) { + case SCSI_QDEPTH_DEFAULT: + scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); + break; + case SCSI_QDEPTH_QFULL: + scsi_track_queue_full(sdev, depth); + break; + case SCSI_QDEPTH_RAMP_UP: + scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); + break; + default: return -EOPNOTSUPP; - - scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); + } return sdev->queue_depth; } EXPORT_SYMBOL_GPL(iscsi_change_queue_depth); -- cgit v1.2.3