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SCSI fixes on 20150719

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Two fairly simple fixes: one is a change that causes us to have a very low
 queue depth leading to performance issues and the other is a null deref
 occasionally in tapes thanks to use after put.
 
 Signed-off-by: James Bottomley <JBottomley@Odin.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Two fairly simple fixes: one is a change that causes us to have a very
  low queue depth leading to performance issues and the other is a null
  deref occasionally in tapes thanks to use after put"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: fix host max depth checking for the 'queue_depth' sysfs interface
  st: null pointer dereference panic caused by use after kref_put by st_open
This commit is contained in:
Linus Torvalds 2015-07-19 14:18:00 -07:00
commit fdbd55fdde
2 changed files with 2 additions and 2 deletions
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2
drivers/scsi/scsi_sysfs.c
View file

@ -859,7 +859,7 @@ sdev_store_queue_depth(struct device *dev, struct device_attribute *attr,
depth = simple_strtoul(buf, NULL, 0);
if (depth < 1 || depth > sht->can_queue)
if (depth < 1 || depth > sdev->host->can_queue)
return -EINVAL;
retval = sht->change_queue_depth(sdev, depth);

2
drivers/scsi/st.c
View file

@ -1329,9 +1329,9 @@ static int st_open(struct inode *inode, struct file *filp)
spin_lock(&st_use_lock);
STp->in_use = 0;
spin_unlock(&st_use_lock);
scsi_tape_put(STp);
if (resumed)
scsi_autopm_put_device(STp->device);
scsi_tape_put(STp);
return retval;
}