From: Christoph Hellwig <hch@xxxxxx>
[ Upstream commit 100c815cbd56480b3e31518475b04719c363614a ]
If we can't get a namespace don't leak the SRCU lock. nvme_ioctl was
working around this, but nvme_pr_command wasn't handling this properly.
Just do what callers would usually expect.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Keith Busch <keith.busch@xxxxxxxxx>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/nvme/host/core.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 8782d86a8ca3..e29c395f44d2 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1362,9 +1362,14 @@ static struct nvme_ns *nvme_get_ns_from_disk(struct gendisk *disk,
{
#ifdef CONFIG_NVME_MULTIPATH
if (disk->fops == &nvme_ns_head_ops) {
+ struct nvme_ns *ns;
+
*head = disk->private_data;
*srcu_idx = srcu_read_lock(&(*head)->srcu);
- return nvme_find_path(*head);
+ ns = nvme_find_path(*head);
+ if (!ns)
+ srcu_read_unlock(&(*head)->srcu, *srcu_idx);
+ return ns;
}
#endif
*head = NULL;
@@ -1411,9 +1416,9 @@ static int nvme_ioctl(struct block_device *bdev, fmode_t mode,
ns = nvme_get_ns_from_disk(bdev->bd_disk, &head, &srcu_idx);
if (unlikely(!ns))
- ret = -EWOULDBLOCK;
- else
- ret = nvme_ns_ioctl(ns, cmd, arg);
+ return -EWOULDBLOCK;
+
+ ret = nvme_ns_ioctl(ns, cmd, arg);
nvme_put_ns_from_disk(head, srcu_idx);
return ret;
}
--
2.20.1
