linux-kernel - [PATCH] lightnvm: calc right rblk when having several luns

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Message-Id: <1455117153-32356-1-git-send-email-javier@javigon.com>
Date:	Wed, 10 Feb 2016 16:12:33 +0100
From:	"Javier González" <jg@...htnvm.io>
To:	mb@...htnvm.io
Cc:	linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
	Javier González <javier@...xlabs.com>
Subject: [PATCH] lightnvm: calc right rblk when having several luns

When getting a new block from the media manager, calculate the right
rblk, considering that the pool of flash blocks has been divided among
the different luns exposed by the underlying device.

Signed-off-by: Javier González <javier@...xlabs.com>
---
 drivers/lightnvm/rrpc.c | 2 +-
 drivers/lightnvm/rrpc.h | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index c2f9a64..d8416ad 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -191,7 +191,7 @@ static struct rrpc_block *rrpc_get_blk(struct rrpc *rrpc, struct rrpc_lun *rlun,
 		return NULL;
 	}
 
-	rblk = &rlun->blocks[blk->id];
+	rblk = rrpc_get_rblk(rlun, blk->id);
 	list_add_tail(&rblk->list, &rlun->open_list);
 	spin_unlock(&lun->lock);
 
diff --git a/drivers/lightnvm/rrpc.h b/drivers/lightnvm/rrpc.h
index 1c4b1c9..8bcb827 100644
--- a/drivers/lightnvm/rrpc.h
+++ b/drivers/lightnvm/rrpc.h
@@ -157,6 +157,15 @@ struct rrpc_rev_addr {
 	u64 addr;
 };
 
+static inline struct rrpc_block *rrpc_get_rblk(struct rrpc_lun *rlun,
+								int blk_id)
+{
+	struct rrpc *rrpc = rlun->rrpc;
+	int blk_pos = blk_id % rrpc->dev->blks_per_lun;
+
+	return &rlun->blocks[blk_pos];
+}
+
 static inline sector_t rrpc_get_laddr(struct bio *bio)
 {
 	return bio->bi_iter.bi_sector / NR_PHY_IN_LOG;
-- 
2.1.4