Cope with some backwards-incompatible driver model API changes
now in the linux-next tree:

- device_create() is going away, even for drivers using it safely,
in favor of device_create_drvdata().
- class->devices is gone, but testing class->p serves the same
purpose (non-null when class is usable with driver model calls).
- class_find_device() needs a new argument #2 (NULL)

Signed-off-by: David Brownell
---
drivers/gpio/gpiolib.c | 16 +++++++---------
1 file changed, 7 insertions(+), 9 deletions(-)

--- a/drivers/gpio/gpiolib.c 2008-07-02 23:29:58.000000000 -0700
+++ b/drivers/gpio/gpiolib.c 2008-07-03 00:04:57.000000000 -0700
@@ -429,7 +429,7 @@ int gpio_export(unsigned gpio, bool dire
int status = -EINVAL;

/* can't export until sysfs is available ... */
- if (!gpio_class.devices.next) {
+ if (!gpio_class.p) {
pr_debug("%s: called too early!\n", __func__);
return -ENOENT;
}
@@ -453,10 +453,9 @@ int gpio_export(unsigned gpio, bool dire
if (status == 0) {
struct device *dev;

- dev = device_create(&gpio_class, desc->chip->dev, 0,
- "gpio%d", gpio);
+ dev = device_create_drvdata(&gpio_class, desc->chip->dev, 0,
+ desc, "gpio%d", gpio);
if (dev) {
- dev_set_drvdata(dev, desc);
if (direction_may_change)
status = sysfs_create_group(&dev->kobj,
&gpio_attr_group);
@@ -506,7 +505,7 @@ void gpio_unexport(unsigned gpio)
if (test_bit(FLAG_EXPORT, &desc->flags)) {
struct device *dev = NULL;

- dev = class_find_device(&gpio_class, desc, match_export);
+ dev = class_find_device(&gpio_class, NULL, desc, match_export);
if (dev) {
clear_bit(FLAG_EXPORT, &desc->flags);
put_device(dev);
@@ -533,15 +532,14 @@ static int gpiochip_export(struct gpio_c
* export this later, in gpiolib_sysfs_init() ... here we just
* verify that _some_ field of gpio_class got initialized.
*/
- if (!gpio_class.devices.next)
+ if (!gpio_class.p)
return 0;

/* use chip->base for the ID; it's already known to be unique */
mutex_lock(&sysfs_lock);
- dev = device_create(&gpio_class, chip->dev, 0,
+ dev = device_create_drvdata(&gpio_class, chip->dev, 0, chip,
"gpiochip%d", chip->base);
if (dev) {
- dev_set_drvdata(dev, chip);
status = sysfs_create_group(&dev->kobj,
&gpiochip_attr_group);
} else
@@ -572,7 +570,7 @@ static void gpiochip_unexport(struct gpi
struct device *dev;

mutex_lock(&sysfs_lock);
- dev = class_find_device(&gpio_class, chip, match_export);
+ dev = class_find_device(&gpio_class, NULL, chip, match_export);
if (dev) {
put_device(dev);
device_unregister(dev);

--
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