ppdev: use new parport device model

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

Initially submitted and committed as:
e7223f186033 ("ppdev: use new parport device model")

But due to some regression it was reverted by:
1701f680407c ("Revert "ppdev: use new parport device model"")

Now that the original source of regression is fixed by:
bbca503b2ee0 ("parport: use subsys_initcall") we can again modify ppdev
to use device model.

Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 20 insertions, 5 deletions

diff --git a/drivers/char/ppdev.c b/drivers/char/ppdev.c
index f8a483c67b07..d23368874710 100644
--- a/drivers/char/ppdev.c
+++ b/drivers/char/ppdev.c
@@ -286,7 +286,7 @@ static int register_device(int minor, struct pp_struct *pp)
         struct parport *port;
         struct pardevice *pdev = NULL;
         char *name;
-        int fl;
+        struct pardev_cb ppdev_cb;
 
         name = kasprintf(GFP_KERNEL, CHRDEV "%x", minor);
         if (name == NULL)
@@ -299,9 +299,11 @@ static int register_device(int minor, struct pp_struct *pp)
                 return -ENXIO;
         }
 
-        fl = (pp->flags & PP_EXCL) ? PARPORT_FLAG_EXCL : 0;
-        pdev = parport_register_device(port, name, NULL,
-                                       NULL, pp_irq, fl, pp);
+        memset(&ppdev_cb, 0, sizeof(ppdev_cb));
+        ppdev_cb.irq_func = pp_irq;
+        ppdev_cb.flags = (pp->flags & PP_EXCL) ? PARPORT_FLAG_EXCL : 0;
+        ppdev_cb.private = pp;
+        pdev = parport_register_dev_model(port, name, &ppdev_cb, minor);
         parport_put_port(port);
 
         if (!pdev) {
@@ -799,10 +801,23 @@ static void pp_detach(struct parport *port)
         device_destroy(ppdev_class, MKDEV(PP_MAJOR, port->number));
 }
 
+static int pp_probe(struct pardevice *par_dev)
+{
+        struct device_driver *drv = par_dev->dev.driver;
+        int len = strlen(drv->name);
+
+        if (strncmp(par_dev->name, drv->name, len))
+                return -ENODEV;
+
+        return 0;
+}
+
 static struct parport_driver pp_driver = {
         .name           = CHRDEV,
-        .attach         = pp_attach,
+        .probe          = pp_probe,
+        .match_port     = pp_attach,
         .detach         = pp_detach,
+        .devmodel       = true,
 };
 
 static int __init ppdev_init(void)