uacce: delete some redundant code.

mainline inclusion
from mainline-v5.11-rc1
commit a67c43ac
category: bugfix
bugzilla: 173981
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a67c43ac37f80b5e7e1876e8f5f7df62027445c8

----------------------------------------------------------------------

Delete some redundant code.
Reviewed-by: NZhou Wang <wangzhou1@hisilicon.com>
Reviewed-by: NJonathan Cameron <Jonathan.Cameron@Huawei.com>
Acked-by: NZhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: NKai Ye <yekai13@huawei.com>
Link: https://lore.kernel.org/r/1604309965-21752-2-git-send-email-yekai13@huawei.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NMingqiang Ling <lingmingqiang@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/misc/uacce/uacce.c

@@ -231,17 +231,6 @@ static int uacce_fops_mmap(struct file *filep, struct vm_area_struct *vma)
 
 	switch (type) {
 	case UACCE_QFRT_MMIO:
-		if (!uacce->ops->mmap) {
-			ret = -EINVAL;
-			goto out_with_lock;
-		}
-
-		ret = uacce->ops->mmap(q, vma, qfr);
-		if (ret)
-			goto out_with_lock;
-
-		break;
-
 	case UACCE_QFRT_DUS:
 		if (!uacce->ops->mmap) {
 			ret = -EINVAL;