linux-kernel - [PATCH] nvme/core:disable streams when get stream params failed

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Date:   Wed, 6 May 2020 16:37:01 +0800
From:   Wu Bo <wubo40@...wei.com>
To:     <kbusch@...nel.org>, <axboe@...com>, <hch@....de>,
        <sagi@...mberg.me>
CC:     <linux-nvme@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <liuzhiqiang26@...wei.com>, <linfeilong@...wei.com>,
        <wubo40@...wei.com>
Subject: [PATCH] nvme/core:disable streams when get stream params failed

After enable nvme streams, then if get stream params failed, 
We should disable streams before return error in 
nvme_configure_directives() function.

Signed-off-by: Wu Bo <wubo40@...wei.com>
---
 drivers/nvme/host/core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index f2adea9..afe1f5a 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -552,8 +552,10 @@ static int nvme_configure_directives(struct nvme_ctrl *ctrl)
 		return ret;
 
 	ret = nvme_get_stream_params(ctrl, &s, NVME_NSID_ALL);
-	if (ret)
+	if (ret) {
+		nvme_disable_streams(ctrl);
 		return ret;
+	}
 
 	ctrl->nssa = le16_to_cpu(s.nssa);
 	if (ctrl->nssa < BLK_MAX_WRITE_HINTS - 1) {
-- 
1.8.3.1