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xen-gntdev: unlock on error path in gntdev_mmap() 

We should unlock here and also decrement the number of &map->users.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Dan Carpenter 2011-03-19 08:45:43 +03:00 committed by Konrad Rzeszutek Wilk
parent 12f0258d5b
commit a93e20a830
1 changed files with 3 additions and 1 deletions
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4
drivers/xen/gntdev.c
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@ -662,7 +662,7 @@ static int gntdev_mmap(struct file *flip, struct vm_area_struct *vma)
if (map->flags) {
if ((vma->vm_flags & VM_WRITE) &&
(map->flags & GNTMAP_readonly))
return -EINVAL;
goto out_unlock_put;
} else {
map->flags = GNTMAP_host_map;
if (!(vma->vm_flags & VM_WRITE))
@ -700,6 +700,8 @@ static int gntdev_mmap(struct file *flip, struct vm_area_struct *vma)
spin_unlock(&priv->lock);
return err;
out_unlock_put:
spin_unlock(&priv->lock);
out_put_map:
if (use_ptemod)
map->vma = NULL;