scsi: core: Show nr_hw_queues in sysfs (64f1501b) · Commits · 戴 / test

So that we don't use a value of 0 for when Scsi_Host.nr_hw_queues is unset, use the tag_set->nr_hw_queues (which holds 1 for this case). Signed-off-by:

John Garry <john.garry@huawei.com> Tested-by:

Douglas Gilbert <dgilbert@interlog.com> Acked-by:

Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by:

Jens Axboe <axboe@kernel.dk>

drivers/scsi/scsi_sysfs.c

+11 −0

Original line number	Diff line number	Diff line
		@@ -393,6 +393,16 @@ show_use_blk_mq(struct device dev, struct device_attribute attr, char *buf)
		}
		static DEVICE_ATTR(use_blk_mq, S_IRUGO, show_use_blk_mq, NULL);

		static ssize_t
		show_nr_hw_queues(struct device dev, struct device_attribute attr, char *buf)
		{
		struct Scsi_Host *shost = class_to_shost(dev);
		struct blk_mq_tag_set *tag_set = &shost->tag_set;

		return snprintf(buf, 20, "%d\n", tag_set->nr_hw_queues);
		}
		static DEVICE_ATTR(nr_hw_queues, S_IRUGO, show_nr_hw_queues, NULL);

		static struct attribute *scsi_sysfs_shost_attrs[] = {
		&dev_attr_use_blk_mq.attr,
		&dev_attr_unique_id.attr,
		@@ -411,6 +421,7 @@ static struct attribute *scsi_sysfs_shost_attrs[] = {
		&dev_attr_prot_guard_type.attr,
		&dev_attr_host_reset.attr,
		&dev_attr_eh_deadline.attr,
		&dev_attr_nr_hw_queues.attr,
		NULL
		};

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