[PATCH 02/26] block: move the DISK_MAX_PARTS sanity check into __device_add_disk

Christoph Hellwig
2021-05-21T05:51:52Z

Keep this together with the first place that actually looks at
->minors and prepare for not passing a minors argument to
alloc_disk.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
block/genhd.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/block/genhd.c b/block/genhd.c
index 2c00bc3261d9..7f9beaeede11 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -491,6 +491,12 @@ static void __device_add_disk(struct device *parent, struct gendisk *disk,
*/
if (disk->major) {
WARN_ON(!disk->minors);
+
+ if (disk->minors > DISK_MAX_PARTS) {
+ pr_err("block: can't allocate more than %d partitions\n",
+ DISK_MAX_PARTS);
+ disk->minors = DISK_MAX_PARTS;
+ }
} else {
WARN_ON(disk->minors);
WARN_ON(!(disk->flags & (GENHD_FL_EXT_DEVT | GENHD_FL_HIDDEN)));
@@ -1264,13 +1270,6 @@ struct gendisk *__alloc_disk_node(int minors, int node_id)
{
struct gendisk *disk;

- if (minors > DISK_MAX_PARTS) {
- printk(KERN_ERR
- "block: can't allocate more than %d partitions\n",
- DISK_MAX_PARTS);
- minors = DISK_MAX_PARTS;
- }
-
disk = kzalloc_node(sizeof(struct gendisk), GFP_KERNEL, node_id);
if (!disk)
return NULL;
--
2.30.2