Re: RFC: add udev support to parport_pc

["Jason Dravet" <dravet@hotmail.com>]

Here is version 2 of the patch.  It should address the issues pointed out so 
far.

Thanks,
Jason

--- /usr/src/linux-2.6.14/drivers/parport/parport_pc.c.orig	2005-12-30 
13:52:48.000000000 -0600
+++ /usr/src/linux-2.6.14/drivers/parport/parport_pc.c	2005-12-31 
13:17:42.000000000 -0600
@@ -14,6 +14,7 @@
  * More PCI support now conditional on CONFIG_PCI, 03/2001, Paul G.
  * Various hacks, Fred Barnes, 04/2001
  * Updated probing logic - Adam Belay <ambx1@neo.rr.com>
+ * Added sysfs and udev - Jason Dravet <dravet@hotmail.com>
  */

/* This driver should work with any hardware that is broadly compatible
@@ -55,6 +56,7 @@
#include <linux/pci.h>
#include <linux/pnp.h>
#include <linux/sysctl.h>
+#include <linux/sysfs.h>

#include <asm/io.h>
#include <asm/dma.h>
@@ -99,6 +101,9 @@ static struct superio_struct {	/* For Su
	int dma;
} superios[NR_SUPERIOS] __devinitdata = { {0,},};

+static struct class *parallel_class;
+int countports = 0;
+
static int user_specified;
#if defined(CONFIG_PARPORT_PC_SUPERIO) || \
        (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
@@ -2232,6 +2237,11 @@ struct parport *parport_pc_probe_port (u
                                            is mandatory (see above) */
		p->dma = PARPORT_DMA_NONE;

+	parallel_class = class_create(THIS_MODULE, "lp");
+	class_device_create(parallel_class, NULL, MKDEV(6, countports), NULL, 
"lp%i", countports);
+	class_device_create(parallel_class, NULL, MKDEV(99, countports), NULL, 
"parport%i", countports);
+	countports++;
+
#ifdef CONFIG_PARPORT_PC_FIFO
	if (parport_ECP_supported(p) &&
	    p->dma != PARPORT_DMA_NOFIFO &&
@@ -3406,6 +3416,13 @@ static void __exit parport_pc_exit(void)
	if (pnp_registered_parport)
		pnp_unregister_driver (&parport_pc_pnp_driver);

+	printk (KERN_WARNING "countports = %i \n", countports);
+	for (countports--; countports >=0; countports--) {
+		printk (KERN_WARNING "countports loop = %i \n", countports);
+		class_device_destroy(parallel_class, MKDEV(99, countports));
+		class_device_destroy(parallel_class, MKDEV(6, countports));
+	}
+
	spin_lock(&ports_lock);
	while (!list_empty(&ports_list)) {
		struct parport_pc_private *priv;