[10/20] drivers/fpga/dfl-afu-dma-region.c: get rid of pointless access_ok()
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Message ID 20200509234557.1124086-10-viro@ZenIV.linux.org.uk
State New
Headers show
Series
  • [01/20] dlmfs_file_write(): get rid of pointless access_ok()
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Commit Message

Al Viro May 9, 2020, 11:45 p.m. UTC
From: Al Viro <viro@zeniv.linux.org.uk>

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>
---
 drivers/fpga/dfl-afu-dma-region.c | 4 ----
 1 file changed, 4 deletions(-)

Patch
diff mbox series

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;