linux-kernel - [PATCH 2/5] st: clean up dev cleanup in st

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Date:	Wed, 16 May 2012 20:56:24 -0700
From:	Lee Duncan <lduncan@...e.com>
To:	linux-scsi@...r.kernel.org
CC:	linux-kernel@...r.kernel.org, kai.makisara@...umbus.fi,
	jeffm@...e.com
Subject: [PATCH 2/5] st: clean up dev cleanup in st_probe

st_probe leaves a cdev pointer hanging around that is compared
during the error path and freed later. There's no need for the pointer
to hang around at all. So we free it immediately and simplify the error
handling.

Signed-off-by: Jeff Mahoney <jeffm@...e.com>
Reviewed-by: Lee Duncan <lduncan@...e.com>
---
 drivers/scsi/st.c |   11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index 532543c..40f9d47 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -4156,6 +4156,7 @@ static int st_probe(struct device *dev)
 				printk(KERN_ERR
 				       "st%d: out of memory. Device not attached.\n",
 				       dev_num);
+				cdev_del(cdev);
 				goto out_free_tape;
 			}
 			cdev->owner = THIS_MODULE;
@@ -4194,17 +4195,13 @@ out_free_tape:
 				  "tape");
 		for (j=0; j < 2; j++) {
 			if (STm->cdevs[j]) {
-				if (cdev == STm->cdevs[j])
-					cdev = NULL;
-					device_destroy(&st_sysfs_class,
-						       MKDEV(SCSI_TAPE_MAJOR,
-							     TAPE_MINOR(i, mode, j)));
+				device_destroy(&st_sysfs_class,
+					       MKDEV(SCSI_TAPE_MAJOR,
+						     TAPE_MINOR(i, mode, j)));
 				cdev_del(STm->cdevs[j]);
 			}
 		}
 	}
-	if (cdev)
-		cdev_del(cdev);
 	write_lock(&st_dev_arr_lock);
 	scsi_tapes[dev_num] = NULL;
 	st_nr_dev--;
-- 
1.7.9.2

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