scsi: ppa: use new parport device model

Modify ppa driver to use the new parallel port device model.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

1 files changed, 40 insertions, 6 deletions

diff --git a/drivers/scsi/ppa.c b/drivers/scsi/ppa.c
index ee00e27ba396..f6ad579280d4 100644
--- a/drivers/scsi/ppa.c
+++ b/drivers/scsi/ppa.c
@@ -37,6 +37,7 @@ typedef struct {
         unsigned long recon_tmo;        /* How many usecs to wait for reconnection (6th bit) */
         unsigned int failed:1;  /* Failure flag                 */
         unsigned wanted:1;      /* Parport sharing busy flag    */
+        unsigned int dev_no;    /* Device number                */
         wait_queue_head_t *waiting;
         struct Scsi_Host *host;
         struct list_head list;
@@ -985,15 +986,40 @@ static struct scsi_host_template ppa_template = {
 
 static LIST_HEAD(ppa_hosts);
 
+/*
+ * Finds the first available device number that can be alloted to the
+ * new ppa device and returns the address of the previous node so that
+ * we can add to the tail and have a list in the ascending order.
+ */
+
+static inline ppa_struct *find_parent(void)
+{
+        ppa_struct *dev, *par = NULL;
+        unsigned int cnt = 0;
+
+        if (list_empty(&ppa_hosts))
+                return NULL;
+
+        list_for_each_entry(dev, &ppa_hosts, list) {
+                if (dev->dev_no != cnt)
+                        return par;
+                cnt++;
+                par = dev;
+        }
+
+        return par;
+}
+
 static int __ppa_attach(struct parport *pb)
 {
         struct Scsi_Host *host;
         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waiting);
         DEFINE_WAIT(wait);
-        ppa_struct *dev;
+        ppa_struct *dev, *temp;
         int ports;
         int modes, ppb, ppb_hi;
         int err = -ENOMEM;
+        struct pardev_cb ppa_cb;
 
         dev = kzalloc(sizeof(ppa_struct), GFP_KERNEL);
         if (!dev)
@@ -1002,8 +1028,15 @@ static int __ppa_attach(struct parport *pb)
         dev->mode = PPA_AUTODETECT;
         dev->recon_tmo = PPA_RECON_TMO;
         init_waitqueue_head(&waiting);
-        dev->dev = parport_register_device(pb, "ppa", NULL, ppa_wakeup,
-                                            NULL, 0, dev);
+        temp = find_parent();
+        if (temp)
+                dev->dev_no = temp->dev_no + 1;
+
+        memset(&ppa_cb, 0, sizeof(ppa_cb));
+        ppa_cb.private = dev;
+        ppa_cb.wakeup = ppa_wakeup;
+
+        dev->dev = parport_register_dev_model(pb, "ppa", &ppa_cb, dev->dev_no);
 
         if (!dev->dev)
                 goto out;
@@ -1110,9 +1143,10 @@ static void ppa_detach(struct parport *pb)
 }
 
 static struct parport_driver ppa_driver = {
-        .name   = "ppa",
-        .attach = ppa_attach,
-        .detach = ppa_detach,
+        .name           = "ppa",
+        .match_port     = ppa_attach,
+        .detach         = ppa_detach,
+        .devmodel       = true,
 };
 
 static int __init ppa_driver_init(void)