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| author | Dan Williams <dan.j.williams@intel.com> | 2014-12-30 14:46:17 -0800 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2015-01-09 15:44:19 +0100 |
| commit | 921ce7f5786052749a22a75780f5ce1a456bcdc6 (patch) | |
| tree | 88b5aa17bc95e68a8ab7635bbc2a0221718044ca /drivers/misc | |
| parent | 967f7bab0eaaa74d7d01a56d45aa309f78fb87dd (diff) | |
| download | op-kernel-dev-921ce7f5786052749a22a75780f5ce1a456bcdc6.zip op-kernel-dev-921ce7f5786052749a22a75780f5ce1a456bcdc6.tar.gz | |
ses: add reliable slot attribute
The name provided by firmware is in a vendor specific format, publish
the slot number to have a reliable mechanism for identifying slots
across firmware implementations. If the enclosure does not provide a
slot number fallback to the component number which is guaranteed unique,
and usually mirrors the slot number.
Cleaned up the unused ses_component.desc in the process.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Reviewed-by: Jens Axboe <axboe@fb.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/enclosure.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/misc/enclosure.c b/drivers/misc/enclosure.c index 958ee98..b62314d 100644 --- a/drivers/misc/enclosure.c +++ b/drivers/misc/enclosure.c @@ -145,8 +145,10 @@ enclosure_register(struct device *dev, const char *name, int components, if (err) goto err; - for (i = 0; i < components; i++) + for (i = 0; i < components; i++) { edev->component[i].number = -1; + edev->component[i].slot = -1; + } mutex_lock(&container_list_lock); list_add_tail(&edev->node, &container_list); @@ -589,6 +591,20 @@ static ssize_t get_component_type(struct device *cdev, return snprintf(buf, 40, "%s\n", enclosure_type[ecomp->type]); } +static ssize_t get_component_slot(struct device *cdev, + struct device_attribute *attr, char *buf) +{ + struct enclosure_component *ecomp = to_enclosure_component(cdev); + int slot; + + /* if the enclosure does not override then use 'number' as a stand-in */ + if (ecomp->slot >= 0) + slot = ecomp->slot; + else + slot = ecomp->number; + + return snprintf(buf, 40, "%d\n", slot); +} static DEVICE_ATTR(fault, S_IRUGO | S_IWUSR, get_component_fault, set_component_fault); @@ -599,6 +615,7 @@ static DEVICE_ATTR(active, S_IRUGO | S_IWUSR, get_component_active, static DEVICE_ATTR(locate, S_IRUGO | S_IWUSR, get_component_locate, set_component_locate); static DEVICE_ATTR(type, S_IRUGO, get_component_type, NULL); +static DEVICE_ATTR(slot, S_IRUGO, get_component_slot, NULL); static struct attribute *enclosure_component_attrs[] = { &dev_attr_fault.attr, @@ -606,6 +623,7 @@ static struct attribute *enclosure_component_attrs[] = { &dev_attr_active.attr, &dev_attr_locate.attr, &dev_attr_type.attr, + &dev_attr_slot.attr, NULL }; ATTRIBUTE_GROUPS(enclosure_component); |
