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device-dax: Kill dax_region ida 

Commit bbb3be170a "device-dax: fix sysfs duplicate warnings" arranged
for passing a dax instance-id to devm_create_dax_dev(), rather than
generating one internally. Remove the dax_region ida and related code.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2017-07-19 14:55:26 -07:00
parent bfeffd1552
commit 21b9e97950
2 changed files with 3 additions and 24 deletions
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3
drivers/dax/dax-private.h
View File

@ -28,7 +28,6 @@
*/
struct dax_region {
int id;
struct ida ida;
void *base;
struct kref kref;
struct device *dev;
@ -42,7 +41,6 @@ struct dax_region {
* @region - parent region
* @dax_dev - core dax functionality
* @dev - device core
* @id - child id in the region
* @num_resources - number of physical address extents in this device
* @res - array of physical address ranges
*/
@ -50,7 +48,6 @@ struct dev_dax {
struct dax_region *region;
struct dax_device *dax_dev;
struct device dev;
int id;
int num_resources;
struct resource res[0];
};

24
drivers/dax/device.c
View File

@ -128,7 +128,6 @@ struct dax_region *alloc_dax_region(struct device *parent, int region_id,
dax_region->pfn_flags = pfn_flags;
kref_init(&dax_region->kref);
dax_region->id = region_id;
ida_init(&dax_region->ida);
dax_region->align = align;
dax_region->dev = parent;
dax_region->base = addr;
@ -582,8 +581,6 @@ static void dev_dax_release(struct device *dev)
struct dax_region *dax_region = dev_dax->region;
struct dax_device *dax_dev = dev_dax->dax_dev;
if (dev_dax->id >= 0)
ida_simple_remove(&dax_region->ida, dev_dax->id);
dax_region_put(dax_region);
put_dax(dax_dev);
kfree(dev_dax);
@ -642,19 +639,7 @@ struct dev_dax *devm_create_dev_dax(struct dax_region *dax_region,
}
if (i < count)
goto err_id;
if (id < 0) {
id = ida_simple_get(&dax_region->ida, 0, 0, GFP_KERNEL);
dev_dax->id = id;
if (id < 0) {
rc = id;
goto err_id;
}
} else {
/* region provider owns @id lifetime */
dev_dax->id = -1;
}
goto err;
/*
* No 'host' or dax_operations since there is no access to this
@ -663,7 +648,7 @@ struct dev_dax *devm_create_dev_dax(struct dax_region *dax_region,
dax_dev = alloc_dax(dev_dax, NULL, NULL);
if (!dax_dev) {
rc = -ENOMEM;
goto err_dax;
goto err;
}
/* from here on we're committed to teardown via dax_dev_release() */
@ -700,10 +685,7 @@ struct dev_dax *devm_create_dev_dax(struct dax_region *dax_region,
return dev_dax;
err_dax:
if (dev_dax->id >= 0)
ida_simple_remove(&dax_region->ida, dev_dax->id);
err_id:
err:
kfree(dev_dax);
return ERR_PTR(rc);