linux-kernel - [PATCH 04/25] lightnvm: unlock rq and free ppa

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Message-Id: <1452581379-18162-5-git-send-email-m@bjorling.me>
Date:	Tue, 12 Jan 2016 07:49:18 +0100
From:	Matias Bjørling <m@...rling.me>
To:	linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
	axboe@...com
Cc:	Wenwei Tao <ww.tao0320@...il.com>,
	Matias Bjørling <m@...rling.me>
Subject: [PATCH 04/25] lightnvm: unlock rq and free ppa_list on submission fail

From: Wenwei Tao <ww.tao0320@...il.com>

When rrpc_write_ppalist_rq and rrpc_read_ppalist_rq succeed, we setup
rq correctly, but nvm_submit_io may afterward fail since it cannot
allocate request or nvme_nvm_command, we return error but forget to
cleanup the previous work.

Signed-off-by: Wenwei Tao <ww.tao0320@...il.com>
Signed-off-by: Matias Bjørling <m@...rling.me>
---
 drivers/lightnvm/rrpc.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index f4bc986..748cab49 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -845,6 +845,12 @@ static int rrpc_submit_io(struct rrpc *rrpc, struct bio *bio,
 	if (err) {
 		pr_err("rrpc: I/O submission failed: %d\n", err);
 		bio_put(bio);
+		if (!(flags & NVM_IOTYPE_GC)) {
+			rrpc_unlock_rq(rrpc, rqd);
+			if (rqd->nr_pages > 1)
+				nvm_dev_dma_free(rrpc->dev,
+			rqd->ppa_list, rqd->dma_ppa_list);
+		}
 		return NVM_IO_ERR;
 	}
 
-- 
2.1.4