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isci: add "isci_id" attribute

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Allow each controller to be identified via sysfs.

# cat /sys/class/scsi_host/host13/isci_id
1

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2011-03-10 00:01:43 -08:00
parent 6e2802a7fc
commit 34cad85d18
1 changed files with 26 additions and 4 deletions
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30
drivers/scsi/isci/init.c
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@ -229,12 +229,28 @@ static int isci_register_sas_ha(struct isci_host *isci_host)
return 0;
}
static void isci_unregister_sas_ha(struct isci_host *isci_host)
static ssize_t isci_show_id(struct device *dev, struct device_attribute *attr, char *buf)
{
struct Scsi_Host *shost = container_of(dev, typeof(*shost), shost_dev);
struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
struct isci_host *ihost = container_of(sas_ha, typeof(*ihost), sas_ha);
return snprintf(buf, PAGE_SIZE, "%d\n", ihost->id);
}
static DEVICE_ATTR(isci_id, S_IRUGO, isci_show_id, NULL);
static void isci_unregister(struct isci_host *isci_host)
{
struct Scsi_Host *shost;
if (!isci_host)
return;
sas_unregister_ha(&(isci_host->sas_ha));
shost = isci_host->shost;
device_remove_file(&shost->shost_dev, &dev_attr_isci_id);
sas_unregister_ha(&isci_host->sas_ha);
sas_remove_host(isci_host->shost);
scsi_remove_host(isci_host->shost);
@ -477,8 +493,14 @@ static struct isci_host *isci_host_alloc(struct pci_dev *pdev, int id)
if (err)
goto err_shost_remove;
err = device_create_file(&shost->shost_dev, &dev_attr_isci_id);
if (err)
goto err_unregister_ha;
return isci_host;
err_unregister_ha:
sas_unregister_ha(&(isci_host->sas_ha));
err_shost_remove:
scsi_remove_host(shost);
err_shost:
@ -640,7 +662,7 @@ static int __devinit isci_pci_probe(struct pci_dev *pdev, const struct pci_devic
err_host_alloc:
for_each_isci_host(i, isci_host, pdev)
isci_unregister_sas_ha(isci_host);
isci_unregister(isci_host);
return err;
}
@ -650,7 +672,7 @@ static void __devexit isci_pci_remove(struct pci_dev *pdev)
int i;
for_each_isci_host(i, isci_host, pdev) {
isci_unregister_sas_ha(isci_host);
isci_unregister(isci_host);
isci_host_deinit(isci_host);
scic_controller_disable_interrupts(isci_host->core_controller);
}