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Subject[PATCH 1/5] lightnvm: pblk: handle bad sectors in the emeta area correctly
Date
From: Hans Holmberg <hans.holmberg@cnexlabs.com>

Unless we check if there are bad sectors in the entire emeta-area
we risk ending up with valid bitmap / available sector count inconsistency.
This results in lines with a bad chunk at the last LUN marked as bad,
so go through the whole emeta area and mark up the invalid sectors.

Signed-off-by: Hans Holmberg <hans.holmberg@cnexlabs.com>
---
drivers/lightnvm/pblk-core.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
index 0487b9340c1d..9027cf2ed1d8 100644
--- a/drivers/lightnvm/pblk-core.c
+++ b/drivers/lightnvm/pblk-core.c
@@ -1021,6 +1021,7 @@ static int pblk_line_init_bb(struct pblk *pblk, struct pblk_line *line,
int nr_bb = 0;
u64 off;
int bit = -1;
+ int emeta_secs;

line->sec_in_line = lm->sec_per_line;

@@ -1055,18 +1056,18 @@ static int pblk_line_init_bb(struct pblk *pblk, struct pblk_line *line,
/* Mark emeta metadata sectors as bad sectors. We need to consider bad
* blocks to make sure that there are enough sectors to store emeta
*/
- off = lm->sec_per_line - lm->emeta_sec[0];
- bitmap_set(line->invalid_bitmap, off, lm->emeta_sec[0]);
- while (nr_bb) {
+ emeta_secs = lm->emeta_sec[0];
+ off = lm->sec_per_line;
+ while (emeta_secs) {
off -= geo->sec_per_pl;
if (!test_bit(off, line->invalid_bitmap)) {
bitmap_set(line->invalid_bitmap, off, geo->sec_per_pl);
- nr_bb--;
+ emeta_secs -= geo->sec_per_pl;
}
}

- line->sec_in_line -= lm->emeta_sec[0];
line->emeta_ssec = off;
+ line->sec_in_line -= lm->emeta_sec[0];
line->nr_valid_lbas = 0;
line->left_msecs = line->sec_in_line;
*line->vsc = cpu_to_le32(line->sec_in_line);
--
2.7.4
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