4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Shaohua Li <shli@xxxxxx> [ Upstream commit b506335e5d2b4ec687dde392a3bdbf7601778f1d ] Commit 6f287ca(md/raid10: reset the 'first' at the end of loop) ignores a case in reshape, the first rdev could be a spare disk, which shouldn't be accounted as the first disk since it doesn't include the offset info. Fix: 6f287ca(md/raid10: reset the 'first' at the end of loop) Cc: Guoqing Jiang <gqjiang@xxxxxxxx> Cc: NeilBrown <neilb@xxxxxxxx> Signed-off-by: Shaohua Li <shli@xxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/md/raid10.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -4089,6 +4089,7 @@ static int raid10_start_reshape(struct m diff = 0; if (first || diff < min_offset_diff) min_offset_diff = diff; + first = 0; } }