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Subject[PATCH 2.6.5 RFT] add class support to drivers/block/paride/pt.c

Hi,

This patch adds class support to pt.c which "the high-level driver for parallel port ATAPI tape
drives based on chips supported by the paride module." Which I dont have in order to test.

I have verified it compiles but can not test it. If someone who has the hardware could
I would appreciate it.

Hanna Linder
IBM Linux Technology Center
------------
diff -Nrup -Xdontdiff linux-2.6.5/drivers/block/paride/pt.c linux-2.6.5p/drivers/block/paride/pt.c
--- linux-2.6.5/drivers/block/paride/pt.c 2004-04-03 19:36:52.000000000 -0800
+++ linux-2.6.5p/drivers/block/paride/pt.c 2004-04-16 16:09:52.000000000 -0700
@@ -145,6 +145,7 @@ static int (*drives[4])[6] = {&drive0, &
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/mtio.h>
+#include <linux/device.h>

#include <asm/uaccess.h>

@@ -260,6 +261,9 @@ static struct file_operations pt_fops =
.release = pt_release,
};

+/* sysfs class support */
+static struct class_simple *pt_class;
+
static inline int status_reg(struct pi_adapter *pi)
{
return pi_read_regr(pi, 1, 6);
@@ -959,33 +963,62 @@ static ssize_t pt_write(struct file *fil

static int __init pt_init(void)
{
- int unit;
+ int unit, err = 0;

- if (disable)
- return -1;
+ if (disable) {
+ err = -1;
+ goto out;
+ }

- if (pt_detect())
- return -1;
+ if (pt_detect()) {
+ err = -1;
+ goto out;
+ }

if (register_chrdev(major, name, &pt_fops)) {
printk("pt_init: unable to get major number %d\n", major);
for (unit = 0; unit < PT_UNITS; unit++)
if (pt[unit].present)
pi_release(pt[unit].pi);
- return -1;
+ err = -1;
+ goto out;
+ }
+ pt_class = class_simple_create(THIS_MODULE, "pt");
+ if (IS_ERR(pt_class)) {
+ err = PTR_ERR(pt_class);
+ goto out_chrdev;
}

devfs_mk_dir("pt");
for (unit = 0; unit < PT_UNITS; unit++)
if (pt[unit].present) {
- devfs_mk_cdev(MKDEV(major, unit),
+ class_simple_device_add(pt_class, MKDEV(major, unit),
+ NULL, "pt%d", unit);
+ err = devfs_mk_cdev(MKDEV(major, unit),
S_IFCHR | S_IRUSR | S_IWUSR,
"pt/%d", unit);
- devfs_mk_cdev(MKDEV(major, unit + 128),
+ if (err) {
+ class_simple_device_remove(MKDEV(major, unit));
+ goto out_class;
+ }
+ class_simple_device_add(pt_class, MKDEV(major, unit + 128),
+ NULL, "pt%dn", unit);
+ err = devfs_mk_cdev(MKDEV(major, unit + 128),
S_IFCHR | S_IRUSR | S_IWUSR,
"pt/%dn", unit);
+ if (err) {
+ class_simple_device_remove(MKDEV(major, unit + 128));
+ goto out_class;
+ }
}
- return 0;
+ goto out;
+
+out_class:
+ class_simple_destroy(pt_class);
+out_chrdev:
+ unregister_chrdev(major, "pt");
+out:
+ return err;
}

static void __exit pt_exit(void)
@@ -993,9 +1026,12 @@ static void __exit pt_exit(void)
int unit;
for (unit = 0; unit < PT_UNITS; unit++)
if (pt[unit].present) {
+ class_simple_device_remove(MKDEV(major, unit));
devfs_remove("pt/%d", unit);
+ class_simple_device_remove(MKDEV(major, unit + 128));
devfs_remove("pt/%dn", unit);
}
+ class_simple_destroy(pt_class);
devfs_remove("pt");
unregister_chrdev(major, name);
for (unit = 0; unit < PT_UNITS; unit++)

-
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