aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/lightnvm
diff options
context:
space:
mode:
authorHans Holmberg <hans.holmberg@cnexlabs.com>2017-10-13 14:46:34 +0200
committerJens Axboe <axboe@kernel.dk>2017-10-13 08:34:57 -0600
commit3e3a5b8ebd5d3b1d68facc58b0674a2564653222 (patch)
tree6cea482b30d7e6e4f66842fd7674dba928e16368 /drivers/lightnvm
parent22a4e061ea11cc754785a12b3ba5f3e135bc0c63 (diff)
lightnvm: pblk: prevent gc kicks when gc is not operational
GC can be kicked after it has been shut down when closing the last line during exit, resulting in accesses to freed structures. Make sure that GC is not triggered while it is not operational. Also make sure that GC won't be re-activated during exit when running on another processor by using timer_del_sync. Signed-off-by: Hans Holmberg <hans.holmberg@cnexlabs.com> Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/lightnvm')
-rw-r--r--drivers/lightnvm/pblk-gc.c9
-rw-r--r--drivers/lightnvm/pblk-init.c1
2 files changed, 6 insertions, 4 deletions
diff --git a/drivers/lightnvm/pblk-gc.c b/drivers/lightnvm/pblk-gc.c
index 7b103bce58bf..81efac18ff57 100644
--- a/drivers/lightnvm/pblk-gc.c
+++ b/drivers/lightnvm/pblk-gc.c
@@ -478,10 +478,10 @@ void pblk_gc_should_start(struct pblk *pblk)
{
struct pblk_gc *gc = &pblk->gc;
- if (gc->gc_enabled && !gc->gc_active)
+ if (gc->gc_enabled && !gc->gc_active) {
pblk_gc_start(pblk);
-
- pblk_gc_kick(pblk);
+ pblk_gc_kick(pblk);
+ }
}
/*
@@ -620,7 +620,8 @@ void pblk_gc_exit(struct pblk *pblk)
flush_workqueue(gc->gc_reader_wq);
flush_workqueue(gc->gc_line_reader_wq);
- del_timer(&gc->gc_timer);
+ gc->gc_enabled = 0;
+ del_timer_sync(&gc->gc_timer);
pblk_gc_stop(pblk, 1);
if (gc->gc_ts)
diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
index 2e599738372d..27eb430958ff 100644
--- a/drivers/lightnvm/pblk-init.c
+++ b/drivers/lightnvm/pblk-init.c
@@ -931,6 +931,7 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
pblk->dev = dev;
pblk->disk = tdisk;
pblk->state = PBLK_STATE_RUNNING;
+ pblk->gc.gc_enabled = 0;
spin_lock_init(&pblk->trans_lock);
spin_lock_init(&pblk->lock);

Privacy Policy