linux-kernel - [PATCH] xen/scsifront: shost_priv() can never return NULL

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Message-Id: <20230822064817.27257-1-jgross@suse.com>
Date:   Tue, 22 Aug 2023 08:48:17 +0200
From:   Juergen Gross <jgross@...e.com>
To:     linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org
Cc:     Juergen Gross <jgross@...e.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Oleksandr Tyshchenko <oleksandr_tyshchenko@...m.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        xen-devel@...ts.xenproject.org,
        Dan Carpenter <dan.carpenter@...aro.org>
Subject: [PATCH] xen/scsifront: shost_priv() can never return NULL

There is no need to check whether shost_priv() returns a non-NULL
value, as the pointer returned is just an offset to the passed in
parameter.

While at it replace an open coded shost_priv() instance.

Reported-by: Dan Carpenter <dan.carpenter@...aro.org>
Signed-off-by: Juergen Gross <jgross@...e.com>
---
 drivers/scsi/xen-scsifront.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/xen-scsifront.c b/drivers/scsi/xen-scsifront.c
index caae61aa2afe..9ec55ddc1204 100644
--- a/drivers/scsi/xen-scsifront.c
+++ b/drivers/scsi/xen-scsifront.c
@@ -743,7 +743,7 @@ static int scsifront_sdev_configure(struct scsi_device *sdev)
 	if (info->host_active == STATE_ERROR)
 		return -EIO;
 
-	if (info && current == info->curr) {
+	if (current == info->curr) {
 		err = xenbus_printf(XBT_NIL, info->dev->nodename,
 			      info->dev_state_path, "%d", XenbusStateConnected);
 		if (err) {
@@ -761,7 +761,7 @@ static void scsifront_sdev_destroy(struct scsi_device *sdev)
 	struct vscsifrnt_info *info = shost_priv(sdev->host);
 	int err;
 
-	if (info && current == info->curr) {
+	if (current == info->curr) {
 		err = xenbus_printf(XBT_NIL, info->dev->nodename,
 			      info->dev_state_path, "%d", XenbusStateClosed);
 		if (err)
@@ -903,7 +903,7 @@ static int scsifront_probe(struct xenbus_device *dev,
 		xenbus_dev_fatal(dev, err, "fail to allocate scsi host");
 		return err;
 	}
-	info = (struct vscsifrnt_info *)host->hostdata;
+	info = shost_priv(host);
 
 	dev_set_drvdata(&dev->dev, info);
 	info->dev = dev;
-- 
2.35.3