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Merge branch 'for-5.11/dax' into for-5.11/libnvdimm

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Pull in miscellaneous device-dax fixups and cleanups for v5.11.
This commit is contained in:
Dan Williams 2020-12-24 10:14:04 -08:00
commit 127c3d2e7e
3 changed files with 28 additions and 44 deletions
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69
drivers/dax/bus.c
View File

@ -367,19 +367,28 @@ void kill_dev_dax(struct dev_dax *dev_dax)
}
EXPORT_SYMBOL_GPL(kill_dev_dax);
static void free_dev_dax_ranges(struct dev_dax *dev_dax)
static void trim_dev_dax_range(struct dev_dax *dev_dax)
{
int i = dev_dax->nr_range - 1;
struct range *range = &dev_dax->ranges[i].range;
struct dax_region *dax_region = dev_dax->region;
int i;
device_lock_assert(dax_region->dev);
for (i = 0; i < dev_dax->nr_range; i++) {
struct range *range = &dev_dax->ranges[i].range;
dev_dbg(&dev_dax->dev, "delete range[%d]: %#llx:%#llx\n", i,
(unsigned long long)range->start,
(unsigned long long)range->end);
__release_region(&dax_region->res, range->start,
range_len(range));
__release_region(&dax_region->res, range->start, range_len(range));
if (--dev_dax->nr_range == 0) {
kfree(dev_dax->ranges);
dev_dax->ranges = NULL;
}
dev_dax->nr_range = 0;
}
static void free_dev_dax_ranges(struct dev_dax *dev_dax)
{
while (dev_dax->nr_range)
trim_dev_dax_range(dev_dax);
}
static void unregister_dev_dax(void *dev)
@ -763,22 +772,14 @@ static int alloc_dev_dax_range(struct dev_dax *dev_dax, u64 start,
return 0;
}
ranges = krealloc(dev_dax->ranges, sizeof(*ranges)
* (dev_dax->nr_range + 1), GFP_KERNEL);
if (!ranges)
alloc = __request_region(res, start, size, dev_name(dev), 0);
if (!alloc)
return -ENOMEM;
alloc = __request_region(res, start, size, dev_name(dev), 0);
if (!alloc) {
/*
* If this was an empty set of ranges nothing else
* will release @ranges, so do it now.
*/
if (!dev_dax->nr_range) {
kfree(ranges);
ranges = NULL;
}
dev_dax->ranges = ranges;
ranges = krealloc(dev_dax->ranges, sizeof(*ranges)
* (dev_dax->nr_range + 1), GFP_KERNEL);
if (!ranges) {
__release_region(res, alloc->start, resource_size(alloc));
return -ENOMEM;
}
@ -804,15 +805,10 @@ static int alloc_dev_dax_range(struct dev_dax *dev_dax, u64 start,
return 0;
rc = devm_register_dax_mapping(dev_dax, dev_dax->nr_range - 1);
if (rc) {
dev_dbg(dev, "delete range[%d]: %pa:%pa\n", dev_dax->nr_range - 1,
&alloc->start, &alloc->end);
dev_dax->nr_range--;
__release_region(res, alloc->start, resource_size(alloc));
return rc;
}
if (rc)
trim_dev_dax_range(dev_dax);
return 0;
return rc;
}
static int adjust_dev_dax_range(struct dev_dax *dev_dax, struct resource *res, resource_size_t size)
@ -885,12 +881,7 @@ static int dev_dax_shrink(struct dev_dax *dev_dax, resource_size_t size)
if (shrink >= range_len(range)) {
devm_release_action(dax_region->dev,
unregister_dax_mapping, &mapping->dev);
__release_region(&dax_region->res, range->start,
range_len(range));
dev_dax->nr_range--;
dev_dbg(dev, "delete range[%d]: %#llx:%#llx\n", i,
(unsigned long long) range->start,
(unsigned long long) range->end);
trim_dev_dax_range(dev_dax);
to_shrink -= shrink;
if (!to_shrink)
break;
@ -1114,16 +1105,9 @@ static ssize_t align_show(struct device *dev,
static ssize_t dev_dax_validate_align(struct dev_dax *dev_dax)
{
resource_size_t dev_size = dev_dax_size(dev_dax);
struct device *dev = &dev_dax->dev;
int i;
if (dev_size > 0 && !alloc_is_aligned(dev_dax, dev_size)) {
dev_dbg(dev, "%s: align %u invalid for size %pa\n",
__func__, dev_dax->align, &dev_size);
return -EINVAL;
}
for (i = 0; i < dev_dax->nr_range; i++) {
size_t len = range_len(&dev_dax->ranges[i].range);
@ -1274,7 +1258,6 @@ static void dev_dax_release(struct device *dev)
put_dax(dax_dev);
free_dev_dax_id(dev_dax);
dax_region_put(dax_region);
kfree(dev_dax->ranges);
kfree(dev_dax->pgmap);
kfree(dev_dax);
}

2
drivers/dax/pmem/core.c
View File

@ -52,7 +52,7 @@ struct dev_dax *__dax_pmem_probe(struct device *dev, enum dev_dax_subsys subsys)
/* adjust the dax_region range to the start of data */
range = pgmap.range;
range.start += offset,
range.start += offset;
dax_region = alloc_dax_region(dev, region_id, &range,
nd_region->target_node, le32_to_cpu(pfn_sb->align),
IORESOURCE_DAX_STATIC);

1
drivers/dax/super.c
View File

@ -752,6 +752,7 @@ err_chrdev:
static void __exit dax_core_exit(void)
{
dax_bus_exit();
unregister_chrdev_region(dax_devt, MINORMASK+1);
ida_destroy(&dax_minor_ida);
dax_fs_exit();