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greybus: vibrator: convert idr to be an ida 

All we need is a simple ida, so use that interface instead of the more
"complex" idr one.  Bonus is we don't need to fix the locking issue I
forgot about when using an idr, as ida has one built-in.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>
hifive-unleashed-5.1
Greg Kroah-Hartman 2015-05-14 10:39:35 -07:00
parent 6f8528e0be
commit 6b17492eee
1 changed files with 7 additions and 7 deletions
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14
drivers/staging/greybus/vibrator.c
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@ -93,7 +93,7 @@ static struct class vibrator_class = {
#endif
};
static DEFINE_IDR(minors);
static DEFINE_IDA(minors);
static int gb_vibrator_connection_init(struct gb_connection *connection)
{
@ -117,7 +117,7 @@ static int gb_vibrator_connection_init(struct gb_connection *connection)
* there is a "real" device somewhere in the kernel for this, but I
* can't find it at the moment...
*/
vib->minor = idr_alloc(&minors, vib, 0, 0, GFP_KERNEL);
vib->minor = ida_simple_get(&minors, 0, 0, GFP_KERNEL);
if (vib->minor < 0) {
retval = vib->minor;
goto error;
@ -126,7 +126,7 @@ static int gb_vibrator_connection_init(struct gb_connection *connection)
"vibrator%d", vib->minor);
if (IS_ERR(dev)) {
retval = -EINVAL;
goto err_idr_remove;
goto err_ida_remove;
}
vib->dev = dev;
@ -139,14 +139,14 @@ static int gb_vibrator_connection_init(struct gb_connection *connection)
retval = sysfs_create_group(&dev->kobj, vibrator_groups[0]);
if (retval) {
device_unregister(dev);
goto err_idr_remove;
goto err_ida_remove;
}
#endif
return 0;
err_idr_remove:
idr_remove(&minors, vib->minor);
err_ida_remove:
ida_simple_remove(&minors, vib->minor);
error:
kfree(vib);
return retval;
@ -159,7 +159,7 @@ static void gb_vibrator_connection_exit(struct gb_connection *connection)
#if LINUX_VERSION_CODE <= KERNEL_VERSION(3,11,0)
sysfs_remove_group(&vib->dev->kobj, vibrator_groups[0]);
#endif
idr_remove(&minors, vib->minor);
ida_simple_remove(&minors, vib->minor);
device_unregister(vib->dev);
kfree(vib);
}