linux-kernel - [PATCH] nvme-multipath: combine grpid and ANA state checks in nvme_parse_ana

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Date:   Tue, 8 Jun 2021 12:13:36 +0800
From:   Wu Bo <wubo40@...wei.com>
To:     <kbusch@...nel.org>, <axboe@...com>, <hch@....de>,
        <sagi@...mberg.me>, <linux-nvme@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     <linfeilong@...wei.com>, <wubo40@...wei.com>
Subject: [PATCH] nvme-multipath: combine grpid and ANA state checks in nvme_parse_ana_log()

Hi,

Combine grpid and ANA state checks in nvme_parse_ana_log() to
reduce repetitive code and more intuitive meaning.

Signed-off-by: Wu Bo <wubo40@...wei.com>
---
 drivers/nvme/host/multipath.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index f81871c..19fe16d 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -522,13 +522,11 @@ static int nvme_parse_ana_log(struct nvme_ctrl *ctrl, void *data,
 		nr_nsids = le32_to_cpu(desc->nnsids);
 		nsid_buf_size = nr_nsids * sizeof(__le32);
 
-		if (WARN_ON_ONCE(desc->grpid == 0))
+		if (WARN_ON_ONCE(desc->grpid == 0 ||
+			le32_to_cpu(desc->grpid) > ctrl->anagrpmax))
 			return -EINVAL;
-		if (WARN_ON_ONCE(le32_to_cpu(desc->grpid) > ctrl->anagrpmax))
-			return -EINVAL;
-		if (WARN_ON_ONCE(desc->state == 0))
-			return -EINVAL;
-		if (WARN_ON_ONCE(desc->state > NVME_ANA_CHANGE))
+		if (WARN_ON_ONCE(desc->state == 0 ||
+			desc->state > NVME_ANA_CHANGE))
 			return -EINVAL;
 
 		offset += sizeof(*desc);
-- 
2.30.2