binder: simplify the return expression of binder_mmap

Simplify the return expression.

Acked-by: Martijn Coenen <maco@android.com>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Link: https://lore.kernel.org/r/20200929015216.1829946-1-liushixin2@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index 37a505c41dec40310a33117e372b130c34f246e9..49c0700816a5d62e076b019171cbe43293d1d949 100644 (file)
--- 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)