From 83a4f2e70470be94c582b3d09e774fc9c4470b40 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Thu, 7 May 2020 21:03:04 -0400
Subject: [PATCH] drivers/fpga/dfl-afu-dma-region.c: get rid of pointless
access_ok()
Git-commit: 83a4f2e70470be94c582b3d09e774fc9c4470b40
References: jsc#SLE-13441
Patch-mainline: v5.8-rc1
Address is passed to get_user_pages_fast(), which does access_ok().
NB: this is called only from ->ioctl(), and only under USER_DS.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
drivers/fpga/dfl-afu-dma-region.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/drivers/fpga/dfl-afu-dma-region.c b/drivers/fpga/dfl-afu-dma-region.c
index 62f924489db5..d902acb36d14 100644
--- a/drivers/fpga/dfl-afu-dma-region.c
+++ b/drivers/fpga/dfl-afu-dma-region.c
@@ -324,10 +324,6 @@ int afu_dma_map_region(struct dfl_feature_platform_data *pdata,
if (user_addr + length < user_addr)
return -EINVAL;
- if (!access_ok((void __user *)(unsigned long)user_addr,
- length))
- return -EINVAL;
-
region = kzalloc(sizeof(*region), GFP_KERNEL);
if (!region)
return -ENOMEM;
--
2.26.2