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authorRakesh Pandit <rakesh@tuxera.com>2017-10-13 15:45:56 +0300
committerJens Axboe <axboe@kernel.dk>2017-10-13 17:34:57 +0300
commite57903fd972a398b7140d0bc055714e13a0e58c5 (patch)
tree588abe3834761bd39dd27abbb437369e130256a1 /drivers/lightnvm/pblk-core.c
parent32c662c58a9b9d0c99e713a14ca323a9a91c73a0 (diff)
downloadlinux-e57903fd972a398b7140d0bc055714e13a0e58c5.tar.xz
lightnvm: pblk: protect line bitmap while submitting meta io
It seems pblk_dealloc_page would race against pblk_alloc_pages for line bitmap for sector allocation.The chances are very low but might as well protect the bitmap properly. Signed-off-by: Rakesh Pandit <rakesh@tuxera.com> Reviewed-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/lightnvm/pblk-core.c')
-rw-r--r--drivers/lightnvm/pblk-core.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
index 81501644fb15..b53bb00a9918 100644
--- a/drivers/lightnvm/pblk-core.c
+++ b/drivers/lightnvm/pblk-core.c
@@ -486,12 +486,14 @@ void pblk_dealloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs)
u64 addr;
int i;
+ spin_lock(&line->lock);
addr = find_next_zero_bit(line->map_bitmap,
pblk->lm.sec_per_line, line->cur_sec);
line->cur_sec = addr - nr_secs;
for (i = 0; i < nr_secs; i++, line->cur_sec--)
WARN_ON(!test_and_clear_bit(line->cur_sec, line->map_bitmap));
+ spin_unlock(&line->lock);
}
u64 __pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs)