GitHub-Mirror/linux-bl808
2
0
Fork 0
mirror of https://github.com/Fishwaldo/linux-bl808.git synced 2025-06-17 20:25:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

lightnvm: track inflight target creations

Browse source 
When creation process is still in progress, target is not yet on
targets list. This causes a chance for removing whole lightnvm
subsystem by calling nvm_unregister() in the meantime and finally by
causing kernel panic inside target init function.

This patch changes the behaviour by adding kref variable which tracks
all the users of nvm_dev structure. When nvm_dev is allocated, kref
value is set to 1. Then before every target creation the value is
increased and decreased after target removal. The extra reference
is decreased when nvm subsystem is unregistered.

Signed-off-by: Igor Konopko <igor.j.konopko@intel.com>
Reviewed-by: Javier González <javier@javigon.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Igor Konopko 2019-05-04 20:38:08 +02:00 • committed by Jens Axboe
parent a24eab5988
commit e69397ea05
2 changed files with 32 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

1
include/linux/lightnvm.h
View file

@ -428,6 +428,7 @@ struct nvm_dev {
char name[DISK_NAME_LEN];
void *private_data;
struct kref ref;
void *rmap;
struct mutex mlock;