[PATCH] pc8736x_gpio: fix re-modprobe errors: fix/finish cdev-init
- Switch from register_chrdev() to (register|alloc)_chrdev_region().
- use a cdev. This was intended for original patchset, but was
overlooked.
We use a single cdev for all pins (minor device-numbers), as gleaned
from cs5535_gpio, and in contrast to whats currently done in scx200_gpio
(which I'll fix soon)
Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/char/pc8736x_gpio.c b/drivers/char/pc8736x_gpio.c
index bfc45e0..11bd78c 100644
--- a/drivers/char/pc8736x_gpio.c
+++ b/drivers/char/pc8736x_gpio.c
@@ -259,7 +259,8 @@
static int __init pc8736x_gpio_init(void)
{
- int rc = 0;
+ int rc;
+ dev_t devid;
pdev = platform_device_alloc(DEVNAME, 0);
if (!pdev)
@@ -307,7 +308,14 @@
}
dev_info(&pdev->dev, "GPIO ioport %x reserved\n", pc8736x_gpio_base);
- rc = register_chrdev(major, DEVNAME, &pc8736x_gpio_fops);
+ if (major) {
+ devid = MKDEV(major, 0);
+ rc = register_chrdev_region(devid, PC8736X_GPIO_CT, DEVNAME);
+ } else {
+ rc = alloc_chrdev_region(&devid, 0, PC8736X_GPIO_CT, DEVNAME);
+ major = MAJOR(devid);
+ }
+
if (rc < 0) {
dev_err(&pdev->dev, "register-chrdev failed: %d\n", rc);
goto undo_request_region;
@@ -318,6 +326,11 @@
}
pc8736x_init_shadow();
+
+ /* ignore minor errs, and succeed */
+ cdev_init(&pc8736x_gpio_cdev, &pc8736x_gpio_fops);
+ cdev_add(&pc8736x_gpio_cdev, devid, PC8736X_GPIO_CT);
+
return 0;
undo_request_region: