[SCSI] libiscsi: hook into ramp up/down handling (1796e722) · Commits · 戴 / test

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>

drivers/scsi/libiscsi.c

+12 −3

Original line number	Diff line number	Diff line
		@@ -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)
		return -EOPNOTSUPP;

		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;
		}
		return sdev->queue_depth;
		}
		EXPORT_SYMBOL_GPL(iscsi_change_queue_depth);

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