[PATCH v3 07/42] hpsa: allow lockup detected to be viewed via sysfs

Don Brace
2015-03-17T20:04:42Z

From: Stephen Cameron <stephenmcameron@gmail.com>

expose a detected lockup via sysfs

Reviewed-by: Scott Teel <scott.teel@pmcs.com>
Reviewed-by: Kevin Barnett <kevin.barnett@pmcs.com>
Signed-off-by: Don Brace <don.brace@pmcs.com>
---
drivers/scsi/hpsa.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 415ec4d..f84d63f 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,
};