[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>

diff --git a/drivers/scsi/dpt_i2o.c b/drivers/scsi/dpt_i2o.c
index dc6b2d4..8939fbf 100644 (file)
--- 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;
+               }
        }
 }