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[SCSI] ipr: fix resource address formatting and add attribute for device ID 

This patch fixes a resource address formatting problem where the first byte
was being zeroed out.

Also, the device ID is now made available as a sysfs attribute.

Signed-off-by: Wayne Boyer <wayneb@linux.vnet.ibm.com>
Acked-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Wayne Boyer 2010-08-11 07:15:17 -07:00 committed by James Bottomley
parent 6f7efaabef
commit 46d7456324
2 changed files with 45 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
drivers/scsi/ipr.c
View File

@ -1096,6 +1096,7 @@ static void ipr_init_res_entry(struct ipr_resource_entry *res,
res->bus = cfgtew->u.cfgte->res_addr.bus;
res->target = cfgtew->u.cfgte->res_addr.target;
res->lun = cfgtew->u.cfgte->res_addr.lun;
res->lun_wwn = get_unaligned_be64(cfgtew->u.cfgte->lun_wwn);
}
ipr_update_ata_class(res, proto);
@ -1142,7 +1143,7 @@ static char *ipr_format_res_path(u8 *res_path, char *buffer, int len)
int i;
char *p = buffer;
res_path[0] = '\0';
*p = '\0';
p += snprintf(p, buffer + len - p, "%02X", res_path[0]);
for (i = 1; res_path[i] != 0xff && ((i * 3) < len); i++)
p += snprintf(p, buffer + len - p, "-%02X", res_path[i]);
@ -4089,6 +4090,7 @@ static int ipr_change_queue_type(struct scsi_device *sdev, int tag_type)
/**
* ipr_show_adapter_handle - Show the adapter's resource handle for this device
* @dev: device struct
* @attr: device attribute structure
* @buf: buffer
*
* Return value:
@ -4122,6 +4124,7 @@ static struct device_attribute ipr_adapter_handle_attr = {
* ipr_show_resource_path - Show the resource path or the resource address for
* this device.
* @dev: device struct
* @attr: device attribute structure
* @buf: buffer
*
* Return value:
@ -4158,9 +4161,46 @@ static struct device_attribute ipr_resource_path_attr = {
.show = ipr_show_resource_path
};
/**
* ipr_show_device_id - Show the device_id for this device.
* @dev: device struct
* @attr: device attribute structure
* @buf: buffer
*
* Return value:
* number of bytes printed to buffer
**/
static ssize_t ipr_show_device_id(struct device *dev, struct device_attribute *attr, char *buf)
{
struct scsi_device *sdev = to_scsi_device(dev);
struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
struct ipr_resource_entry *res;
unsigned long lock_flags = 0;
ssize_t len = -ENXIO;
spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
res = (struct ipr_resource_entry *)sdev->hostdata;
if (res && ioa_cfg->sis64)
len = snprintf(buf, PAGE_SIZE, "0x%llx\n", res->dev_id);
else if (res)
len = snprintf(buf, PAGE_SIZE, "0x%llx\n", res->lun_wwn);
spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
return len;
}
static struct device_attribute ipr_device_id_attr = {
.attr = {
.name = "device_id",
.mode = S_IRUGO,
},
.show = ipr_show_device_id
};
/**
* ipr_show_resource_type - Show the resource type for this device.
* @dev: device struct
* @attr: device attribute structure
* @buf: buffer
*
* Return value:
@ -4195,6 +4235,7 @@ static struct device_attribute ipr_resource_type_attr = {
static struct device_attribute *ipr_dev_attrs[] = {
&ipr_adapter_handle_attr,
&ipr_resource_path_attr,
&ipr_device_id_attr,
&ipr_resource_type_attr,
NULL,
};

4
drivers/scsi/ipr.h
View File

@ -26,6 +26,7 @@
#ifndef _IPR_H
#define _IPR_H
#include <asm/unaligned.h>
#include <linux/types.h>
#include <linux/completion.h>
#include <linux/libata.h>
@ -372,7 +373,7 @@ struct ipr_config_table_entry {
struct ipr_res_addr res_addr;
__be32 res_handle;
__be32 reserved4[2];
__be32 lun_wwn[2];
struct ipr_std_inq_data std_inq_data;
}__attribute__ ((packed, aligned (4)));
@ -1210,6 +1211,7 @@ struct ipr_resource_entry {
__be32 res_handle;
__be64 dev_id;
__be64 lun_wwn;
struct scsi_lun dev_lun;
u8 res_path[8];