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| author | Mike Christie <michaelc@cs.wisc.edu> | 2009-11-11 16:34:36 -0600 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2009-12-04 12:01:39 -0600 |
| commit | 1796e72291b2b6aafaec5954e666d0b5a95da935 (patch) | |
| tree | 41432a598971de113b213ff39736b436a97113cc | |
| parent | b20d038dff877566694181578c49c31616d622cd (diff) | |
| download | kernel_samsung_smdk4412-1796e72291b2b6aafaec5954e666d0b5a95da935.zip kernel_samsung_smdk4412-1796e72291b2b6aafaec5954e666d0b5a95da935.tar.gz kernel_samsung_smdk4412-1796e72291b2b6aafaec5954e666d0b5a95da935.tar.bz2 | |
[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 <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
| -rw-r--r-- | drivers/scsi/libiscsi.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index 07ec997..b7689f3 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); |