[PATCH 04/13] lightnvm: pblk: Rollback in gc read

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Currently in case of error returned by pblk_gc_line
to pblk_gc_read we leave current line unassigned
from all the lists. This patch fixes that issue.

Signed-off-by: Igor Konopko <igor.j.konopko@xxxxxxxxx>
---
 drivers/lightnvm/pblk-gc.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/lightnvm/pblk-gc.c b/drivers/lightnvm/pblk-gc.c
index 511ed0d5333c..533da6ea3e15 100644
--- a/drivers/lightnvm/pblk-gc.c
+++ b/drivers/lightnvm/pblk-gc.c
@@ -361,8 +361,13 @@ static int pblk_gc_read(struct pblk *pblk)
 
 	pblk_gc_kick(pblk);
 
-	if (pblk_gc_line(pblk, line))
+	if (pblk_gc_line(pblk, line)) {
 		pblk_err(pblk, "failed to GC line %d\n", line->id);
+		/* rollback */
+		spin_lock(&gc->r_lock);
+		list_add_tail(&line->list, &gc->r_list);
+		spin_unlock(&gc->r_lock);
+	}
 
 	return 0;
 }
-- 
2.17.1




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