[SCSI] hpsa: Add a per controller commands_outstanding entry in /sys

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index ddd729e2ea89..c255f46e6405 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -159,6 +159,8 @@ static ssize_t unique_id_show(struct device *dev,
         struct device_attribute *attr, char *buf);
 static ssize_t host_show_firmware_revision(struct device *dev,
              struct device_attribute *attr, char *buf);
+static ssize_t host_show_commands_outstanding(struct device *dev,
+             struct device_attribute *attr, char *buf);
 static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno);
 static ssize_t host_store_rescan(struct device *dev,
          struct device_attribute *attr, const char *buf, size_t count);
@@ -188,6 +190,8 @@ static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL);
 static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
 static DEVICE_ATTR(firmware_revision, S_IRUGO,
         host_show_firmware_revision, NULL);
+static DEVICE_ATTR(commands_outstanding, S_IRUGO,
+        host_show_commands_outstanding, NULL);
 
 static struct device_attribute *hpsa_sdev_attrs[] = {
         &dev_attr_raid_level,
@@ -199,6 +203,7 @@ static struct device_attribute *hpsa_sdev_attrs[] = {
 static struct device_attribute *hpsa_shost_attrs[] = {
         &dev_attr_rescan,
         &dev_attr_firmware_revision,
+        &dev_attr_commands_outstanding,
         NULL,
 };
 
@@ -299,6 +304,15 @@ static ssize_t host_show_firmware_revision(struct device *dev,
                 fwrev[0], fwrev[1], fwrev[2], fwrev[3]);
 }
 
+static ssize_t host_show_commands_outstanding(struct device *dev,
+             struct device_attribute *attr, char *buf)
+{
+        struct Scsi_Host *shost = class_to_shost(dev);
+        struct ctlr_info *h = shost_to_hba(shost);
+
+        return snprintf(buf, 20, "%d\n", h->commands_outstanding);
+}
+
 /* Enqueuing and dequeuing functions for cmdlists. */
 static inline void addQ(struct hlist_head *list, struct CommandList *c)
 {