diff options
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/cciss.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index 79afca2e824..ae0cb1329e9 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -579,6 +579,31 @@ static ssize_t dev_show_rev(struct device *dev, } DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL); +static ssize_t cciss_show_lunid(struct device *dev, + struct device_attribute *attr, char *buf) +{ + drive_info_struct *drv = dev_get_drvdata(dev); + struct ctlr_info *h = to_hba(drv->dev->parent); + unsigned long flags; + unsigned char lunid[8]; + + spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); + if (h->busy_configuring) { + spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); + return -EBUSY; + } + if (!drv->heads) { + spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); + return -ENOTTY; + } + memcpy(lunid, drv->LunID, sizeof(lunid)); + spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); + return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", + lunid[0], lunid[1], lunid[2], lunid[3], + lunid[4], lunid[5], lunid[6], lunid[7]); +} +DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL); + static struct attribute *cciss_host_attrs[] = { &dev_attr_rescan.attr, NULL @@ -604,6 +629,7 @@ static struct attribute *cciss_dev_attrs[] = { &dev_attr_model.attr, &dev_attr_vendor.attr, &dev_attr_rev.attr, + &dev_attr_lunid.attr, NULL }; |