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authorJohn Garry <john.garry@huawei.com>2020-08-19 23:20:31 +0800
committerJens Axboe <axboe@kernel.dk>2020-10-06 08:33:44 -0600
commit64f1501bd2a9c8ab1df548e1ed224552f9c7ac71 (patch)
tree827c66f697bac32de0d5cafb6daf94f36456e821 /drivers/scsi/scsi_sysfs.c
parentbdb01301f3ea51a59eff252b06643fc1fe843e57 (diff)
scsi: core: Show nr_hw_queues in sysfs
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>
Diffstat (limited to 'drivers/scsi/scsi_sysfs.c')
-rw-r--r--drivers/scsi/scsi_sysfs.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index 163dbcb741c1..d6e344fa33ad 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -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
};