[v5,07/42] hpsa: allow lockup detected to be viewed via sysfs

Commit Message

Don Brace April 23, 2015, 2:32 p.m. UTC

From: Stephen Cameron <[e-mail]>

expose a detected lockup via sysfs

Reviewed-by: Scott Teel <[e-mail]>
Reviewed-by: Kevin Barnett <[e-mail]>
Reviewed-by: Tomas Henzl <[e-mail]>
Reviewed-by: Hannes Reinecke <[e-mail]>
Signed-off-by: Don Brace <[e-mail]>
---
 drivers/scsi/hpsa.c |   17 +++++++++++++++++
 1 file changed, 17 insertions(+)


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Patch

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index f9e8f7d..26e5988 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -351,6 +351,20 @@  static int check_for_busy(struct ctlr_info *h, struct CommandList *c)
 	return 1;
 }
 
+static u32 lockup_detected(struct ctlr_info *h);
+static ssize_t host_show_lockup_detected(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	int ld;
+	struct ctlr_info *h;
+	struct Scsi_Host *shost = class_to_shost(dev);
+
+	h = shost_to_hba(shost);
+	ld = lockup_detected(h);
+
+	return sprintf(buf, "ld=%d\n", ld);
+}
+
 static ssize_t host_store_hp_ssd_smart_path_status(struct device *dev,
 					 struct device_attribute *attr,
 					 const char *buf, size_t count)
@@ -698,12 +712,15 @@  static DEVICE_ATTR(transport_mode, S_IRUGO,
 	host_show_transport_mode, NULL);
 static DEVICE_ATTR(resettable, S_IRUGO,
 	host_show_resettable, NULL);
+static DEVICE_ATTR(lockup_detected, S_IRUGO,
+	host_show_lockup_detected, NULL);
 
 static struct device_attribute *hpsa_sdev_attrs[] = {
 	&dev_attr_raid_level,
 	&dev_attr_lunid,
 	&dev_attr_unique_id,
 	&dev_attr_hp_ssd_smart_path_enabled,
+	&dev_attr_lockup_detected,
 	NULL,
 };