linux-kernel - [PATCH 1/3] nvme: do not check for ns on rw path

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Message-Id: <1509703370-20379-2-git-send-email-javier@cnexlabs.com>
Date:   Fri,  3 Nov 2017 11:02:48 +0100
From:   "Javier González" <jg@...htnvm.io>
To:     hch@....de, sagi@...mberg.me, keith.busch@...el.com
Cc:     linux-nvme@...ts.infradead.org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Javier González <javier@...xlabs.com>
Subject: [PATCH 1/3] nvme: do not check for ns on rw path

On the rw path, the ns is assumed to be set. However, a check is still
done, inherited from the time the code resided at nvme_queue_rq().

Eliminate this check, which also eliminates a smatch complain for not
doing proper NULL checks on ns.

Signed-off-by: Javier González <javier@...xlabs.com>
---
 drivers/nvme/host/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 5a14cc7f28ee..bd1d5ff911c9 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -472,7 +472,7 @@ static inline blk_status_t nvme_setup_rw(struct nvme_ns *ns,
 	 * unless this namespace is formated such that the metadata can be
 	 * stripped/generated by the controller with PRACT=1.
 	 */
-	if (ns && ns->ms &&
+	if (ns->ms &&
 	    (!ns->pi_type || ns->ms != sizeof(struct t10_pi_tuple)) &&
 	    !blk_integrity_rq(req) && !blk_rq_is_passthrough(req))
 		return BLK_STS_NOTSUPP;
-- 
2.7.4