From: Hans Holmberg <hans.holmberg@cnexlabs.com>
Date: Fri, 13 Oct 2017 14:46:42 +0200
Subject: [PATCH] lightnvm: pblk: correct valid lba count calculation
Git-commit: 03e868eb8adb28e34f6e695667d230786bfdb653
Patch-mainline: v4.15-rc1
References: bsc#1104967,FATE#325924
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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During garbage collect, lbas being written can end up
being invalidated. Make sure that this is reflected in
the valid lba count.
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>
Acked-by: Hannes Reinecke <hare@suse.com>
---
drivers/lightnvm/pblk-map.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/lightnvm/pblk-map.c b/drivers/lightnvm/pblk-map.c
index 3bc4c94f9cf2..6f3ecde2140f 100644
--- a/drivers/lightnvm/pblk-map.c
+++ b/drivers/lightnvm/pblk-map.c
@@ -45,6 +45,8 @@ static void pblk_map_page_data(struct pblk *pblk, unsigned int sentry,
paddr = pblk_alloc_page(pblk, line, nr_secs);
for (i = 0; i < nr_secs; i++, paddr++) {
+ __le64 addr_empty = cpu_to_le64(ADDR_EMPTY);
+
/* ppa to be sent to the device */
ppa_list[i] = addr_to_gen_ppa(pblk, paddr, line->id);
@@ -61,10 +63,9 @@ static void pblk_map_page_data(struct pblk *pblk, unsigned int sentry,
w_ctx->ppa = ppa_list[i];
meta_list[i].lba = cpu_to_le64(w_ctx->lba);
lba_list[paddr] = cpu_to_le64(w_ctx->lba);
- line->nr_valid_lbas++;
+ if (lba_list[paddr] != addr_empty)
+ line->nr_valid_lbas++;
} else {
- __le64 addr_empty = cpu_to_le64(ADDR_EMPTY);
-
lba_list[paddr] = meta_list[i].lba = addr_empty;
__pblk_map_invalidate(pblk, line, paddr);
}
--
2.12.3