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authorDan Williams <dan.j.williams@intel.com>2020-12-24 10:14:04 -0800
committerDan Williams <dan.j.williams@intel.com>2020-12-24 10:14:04 -0800
commit127c3d2e7e8a79628160e56e54d2be099bdd47c6 (patch)
treeaa72591b75209d06ca673f2f57559ad8b5e2b4f7
parent4c46764733c85b82c07e9559b39da4d00a7dd659 (diff)
parentff8da37d3d8d438ded5a4841d979899269b94d0d (diff)
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Merge branch 'for-5.11/dax' into for-5.11/libnvdimm
Pull in miscellaneous device-dax fixups and cleanups for v5.11.
-rw-r--r--drivers/dax/bus.c71
-rw-r--r--drivers/dax/pmem/core.c2
-rw-r--r--drivers/dax/super.c1
3 files changed, 29 insertions, 45 deletions
diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c
index 27513d311242..737b207c9e30 100644
--- a/drivers/dax/bus.c
+++ b/drivers/dax/bus.c
@@ -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;
-
- __release_region(&dax_region->res, range->start,
- range_len(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));
+ 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);
}
diff --git a/drivers/dax/pmem/core.c b/drivers/dax/pmem/core.c
index 62b26bfceab1..062e8bc14223 100644
--- a/drivers/dax/pmem/core.c
+++ b/drivers/dax/pmem/core.c
@@ -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);
diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index edc279be3e59..cadbd0a1a1ef 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -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();