linux-kernel - [PATCH AUTOSEL for 4.14 128/135] lightnvm: pblk: use right flag for GC allocation

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Message-ID: <20171207154513.4154-128-alexander.levin@verizon.com>
Date:   Thu, 7 Dec 2017 15:46:02 +0000
From:   alexander.levin@...izon.com
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Cc:     Javier González <javier@...xlabs.com>,
        Matias Bjørling <m@...rling.me>,
        Jens Axboe <axboe@...nel.dk>, alexander.levin@...izon.com
Subject: [PATCH AUTOSEL for 4.14 128/135] lightnvm: pblk: use right flag for
 GC allocation

From: Javier González <javier@...xlabs.com>

[ Upstream commit 7d327a9ed6c4dca341ebf99012e0a6b80a3050e6 ]

The data buffer for the GC path allocates virtual memory through
vmalloc. When this change was introduced, a flag signaling kmalloc'ed
memory was wrongly introduced. Use the right flag when creating a bio
from this buffer.

Fixes: de54e703a422 ("lightnvm: pblk: use vmalloc for GC data buffer")
Signed-off-by: Javier González <javier@...xlabs.com>
Signed-off-by: Matias Bjørling <m@...rling.me>
Signed-off-by: Jens Axboe <axboe@...nel.dk>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
---
 drivers/lightnvm/pblk-read.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/lightnvm/pblk-read.c b/drivers/lightnvm/pblk-read.c
index d682e89e6493..ee8efb55b330 100644
--- a/drivers/lightnvm/pblk-read.c
+++ b/drivers/lightnvm/pblk-read.c
@@ -499,7 +499,7 @@ int pblk_submit_read_gc(struct pblk *pblk, u64 *lba_list, void *data,
 
 	data_len = (*secs_to_gc) * geo->sec_size;
 	bio = pblk_bio_map_addr(pblk, data, *secs_to_gc, data_len,
-						PBLK_KMALLOC_META, GFP_KERNEL);
+						PBLK_VMALLOC_META, GFP_KERNEL);
 	if (IS_ERR(bio)) {
 		pr_err("pblk: could not allocate GC bio (%lu)\n", PTR_ERR(bio));
 		goto err_free_dma;
@@ -519,7 +519,7 @@ int pblk_submit_read_gc(struct pblk *pblk, u64 *lba_list, void *data,
 	if (ret) {
 		bio_endio(bio);
 		pr_err("pblk: GC read request failed\n");
-		goto err_free_dma;
+		goto err_free_bio;
 	}
 
 	if (!wait_for_completion_io_timeout(&wait,
@@ -541,10 +541,13 @@ int pblk_submit_read_gc(struct pblk *pblk, u64 *lba_list, void *data,
 	atomic_long_sub(*secs_to_gc, &pblk->inflight_reads);
 #endif
 
+	bio_put(bio);
 out:
 	nvm_dev_dma_free(dev->parent, rqd.meta_list, rqd.dma_meta_list);
 	return NVM_IO_OK;
 
+err_free_bio:
+	bio_put(bio);
 err_free_dma:
 	nvm_dev_dma_free(dev->parent, rqd.meta_list, rqd.dma_meta_list);
 	return NVM_IO_ERR;
-- 
2.11.0