linux-kernel - [PATCH 2/9] lightnvm: pblk: recover partially written lines correctly

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Message-Id: <1507025113-13351-3-git-send-email-hans.ml.holmberg@owltronix.com>
Date:   Tue,  3 Oct 2017 12:05:06 +0200
From:   Hans Holmberg <hans.ml.holmberg@...tronix.com>
To:     Matias Bjorling <mb@...htnvm.io>
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Javier Gonzales <jg@...htnvm.io>,
        Hans Holmberg <hans.ml.holmberg@...tronix.com>,
        Hans Holmberg <hans.holmberg@...xlabs.com>
Subject: [PATCH 2/9] lightnvm: pblk: recover partially written lines correctly

From: Hans Holmberg <hans.holmberg@...xlabs.com>

When recovering partially written lines, the valid sector
count must be decreased by the number of padded sectors
in the line.

Update line recovery to take all ADDR_EMPTY(padded) sectors
into account.

Signed-off-by: Hans Holmberg <hans.holmberg@...xlabs.com>
---
 drivers/lightnvm/pblk-recovery.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/lightnvm/pblk-recovery.c b/drivers/lightnvm/pblk-recovery.c
index 1869eef..74b3b86 100644
--- a/drivers/lightnvm/pblk-recovery.c
+++ b/drivers/lightnvm/pblk-recovery.c
@@ -133,8 +133,8 @@ static int pblk_recov_l2p_from_emeta(struct pblk *pblk, struct pblk_line *line)
 	struct pblk_emeta *emeta = line->emeta;
 	struct line_emeta *emeta_buf = emeta->buf;
 	__le64 *lba_list;
-	int data_start;
-	int nr_data_lbas, nr_valid_lbas, nr_lbas = 0;
+	int data_start, data_end;
+	int nr_valid_lbas, nr_lbas = 0;
 	int i;
 
 	lba_list = pblk_recov_get_lba_list(pblk, emeta_buf);
@@ -142,10 +142,10 @@ static int pblk_recov_l2p_from_emeta(struct pblk *pblk, struct pblk_line *line)
 		return 1;
 
 	data_start = pblk_line_smeta_start(pblk, line) + lm->smeta_sec;
-	nr_data_lbas = lm->sec_per_line - lm->emeta_sec[0];
+	data_end = lm->sec_per_line - lm->emeta_sec[0];
 	nr_valid_lbas = le64_to_cpu(emeta_buf->nr_valid_lbas);
 
-	for (i = data_start; i < nr_data_lbas && nr_lbas < nr_valid_lbas; i++) {
+	for (i = data_start; i < data_end; i++) {
 		struct ppa_addr ppa;
 		int pos;
 
-- 
2.7.4