[SCSI] dpt_i2o: sysfs code

Create a /sys/class/dpt_i2o directory and populate it with
dptiN directories. Each dptiN directory contains a "dev" file
that makes udev create /dev/dptiN

Signed-off-by: Miquel van Smoorenburg <miquels@cistron.nl>
Acked-by: Mark Salyzyn <Mark_Salyzyn@adaptec.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/drivers/scsi/dpt_i2o.c b/drivers/scsi/dpt_i2o.c
index dc6b2d4a9aa1..8939fbf102fc 100644
--- a/drivers/scsi/dpt_i2o.c
+++ b/drivers/scsi/dpt_i2o.c
@@ -111,6 +111,8 @@ static int sys_tbl_len;
 static adpt_hba* hba_chain = NULL;
 static int hba_count = 0;
 
+static struct class *adpt_sysfs_class;
+
 #ifdef CONFIG_COMPAT
 static long compat_adpt_ioctl(struct file *, unsigned int, unsigned long);
 #endif
@@ -254,6 +256,12 @@ rebuild_sys_tab:
                 adpt_inquiry(pHba);
         }
 
+        adpt_sysfs_class = class_create(THIS_MODULE, "dpt_i2o");
+        if (IS_ERR(adpt_sysfs_class)) {
+                printk(KERN_WARNING"dpti: unable to create dpt_i2o class\n");
+                adpt_sysfs_class = NULL;
+        }
+
         for (pHba = hba_chain; pHba; pHba = pHba->next) {
                 if (adpt_scsi_host_alloc(pHba, sht) < 0){
                         adpt_i2o_delete_hba(pHba);
@@ -261,6 +269,16 @@ rebuild_sys_tab:
                 }
                 pHba->initialized = TRUE;
                 pHba->state &= ~DPTI_STATE_RESET;
+                if (adpt_sysfs_class) {
+                        struct device *dev = device_create(adpt_sysfs_class,
+                                NULL, MKDEV(DPTI_I2O_MAJOR, pHba->unit),
+                                "dpti%d", pHba->unit);
+                        if (IS_ERR(dev)) {
+                                printk(KERN_WARNING"dpti%d: unable to "
+                                        "create device in dpt_i2o class\n",
+                                        pHba->unit);
+                        }
+                }
         }
 
         // Register our control device node
@@ -1212,8 +1230,16 @@ static void adpt_i2o_delete_hba(adpt_hba* pHba)
         pci_dev_put(pHba->pDev);
         kfree(pHba);
 
+        if (adpt_sysfs_class)
+                device_destroy(adpt_sysfs_class,
+                                MKDEV(DPTI_I2O_MAJOR, pHba->unit));
+
         if(hba_count <= 0){
                 unregister_chrdev(DPTI_I2O_MAJOR, DPT_DRIVER);   
+                if (adpt_sysfs_class) {
+                        class_destroy(adpt_sysfs_class);
+                        adpt_sysfs_class = NULL;
+                }
         }
 }