[PATCH v3 -next] binder: simplify the return expression of binder_mmap

Liu Shixin
2020-09-29T01:30:21Z

Simplify the return expression.

Signed-off-by: Liu Shixin <liushixin2@huawei.com>
---
v3: Add the change description.
v2: Get rid of the "ret" and "failure string" variables.
v1: Simplify the return expression.
---
drivers/android/binder.c | 18 ++++--------------
1 file changed, 4 insertions(+), 14 deletions(-)

diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index 37a505c41dec..49c0700816a5 100644
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -5180,9 +5180,7 @@ static const struct vm_operations_struct binder_vm_ops = {

static int binder_mmap(struct file *filp, struct vm_area_struct *vma)
{
- int ret;
struct binder_proc *proc = filp->private_data;
- const char *failure_string;

if (proc->tsk != current->group_leader)
return -EINVAL;
@@ -5194,9 +5192,9 @@ static int binder_mmap(struct file *filp, struct vm_area_struct *vma)
(unsigned long)pgprot_val(vma->vm_page_prot));

if (vma->vm_flags & FORBIDDEN_MMAP_FLAGS) {
- ret = -EPERM;
- failure_string = "bad vm_flags";
- goto err_bad_arg;
+ pr_err("%s: %d %lx-%lx %s failed %d\n", __func__,
+ proc->pid, vma->vm_start, vma->vm_end, "bad vm_flags", -EPERM);
+ return -EPERM;
}
vma->vm_flags |= VM_DONTCOPY | VM_MIXEDMAP;
vma->vm_flags &= ~VM_MAYWRITE;
@@ -5204,15 +5202,7 @@ static int binder_mmap(struct file *filp, struct vm_area_struct *vma)
vma->vm_ops = &binder_vm_ops;
vma->vm_private_data = proc;

- ret = binder_alloc_mmap_handler(&proc->alloc, vma);
- if (ret)
- return ret;
- return 0;
-
-err_bad_arg:
- pr_err("%s: %d %lx-%lx %s failed %d\n", __func__,
- proc->pid, vma->vm_start, vma->vm_end, failure_string, ret);
- return ret;
+ return binder_alloc_mmap_handler(&proc->alloc, vma);
}

static int binder_open(struct inode *nodp, struct file *filp)
--
2.25.1