[PATCH] habanalabs: use u64_to_user_ptr() for reading user pointers

From: Arnd Bergmann
Date: Mon Jun 17 2019 - 08:46:52 EST


We cannot cast a 64-bit integer to a pointer on 32-bit architectures
without a warning:

drivers/misc/habanalabs/habanalabs_ioctl.c: In function 'debug_coresight':
drivers/misc/habanalabs/habanalabs_ioctl.c:143:23: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
input = memdup_user((const void __user *) args->input_ptr,

Use the macro that was defined for this purpose.

Fixes: 315bc055ed56 ("habanalabs: add new IOCTL for debug, tracing and profiling")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
drivers/misc/habanalabs/habanalabs_ioctl.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/misc/habanalabs/habanalabs_ioctl.c b/drivers/misc/habanalabs/habanalabs_ioctl.c
index eeefb22023e9..b7a0eecf6b6c 100644
--- a/drivers/misc/habanalabs/habanalabs_ioctl.c
+++ b/drivers/misc/habanalabs/habanalabs_ioctl.c
@@ -140,7 +140,7 @@ static int debug_coresight(struct hl_device *hdev, struct hl_debug_args *args)
params->op = args->op;

if (args->input_ptr && args->input_size) {
- input = memdup_user((const void __user *) args->input_ptr,
+ input = memdup_user(u64_to_user_ptr(args->input_ptr),
args->input_size);
if (IS_ERR(input)) {
rc = PTR_ERR(input);
--
2.20.0