The next code fragment "list_for_each_entry" is not depend on "minor". With this
patch, the free of "minor" in "list_for_each_entry" can be reduced, and there is
no functional change.
Signed-off-by: Zhen Lei <thunder.leizhen@xxxxxxxxxx>
---
drivers/vfio/vfio.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index f018d8d..737eb468 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -225,22 +225,21 @@ static struct vfio_group *vfio_create_group(struct iommu_group *iommu_group)
mutex_lock(&vfio.group_lock);
- minor = vfio_alloc_group_minor(group);
- if (minor < 0) {
- vfio_group_unlock_and_free(group);
- return ERR_PTR(minor);
- }
-
/* Did we race creating this group? */
list_for_each_entry(tmp, &vfio.group_list, vfio_next) {
if (tmp->iommu_group == iommu_group) {
vfio_group_get(tmp);
- vfio_free_group_minor(minor);
vfio_group_unlock_and_free(group);
return tmp;
}
}
+ minor = vfio_alloc_group_minor(group);
+ if (minor < 0) {
+ vfio_group_unlock_and_free(group);
+ return ERR_PTR(minor);
+ }
+
dev = device_create(vfio.class, NULL,
MKDEV(MAJOR(vfio.group_devt), minor),
group, "%d", iommu_group_id(iommu_group));
--
1.8.0
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