meta-xilinx/meta-xilinx-bsp/recipes-graphics/mali/kernel-module-mali/0016-mali_memory_secure-Kernel-5.0-onwards-access_ok-API-.patch

From 8cf1dd43f3f25cb4afb84dfc3b0e7c02bc8f7f0c Mon Sep 17 00:00:00 2001
From: Madhurkiran Harikrishnan <madhurkiran.harikrishnan@xilinx.com>
Date: Mon, 24 Feb 2020 18:19:37 -0800
Subject: [LINUX][rel-v2020.1][PATCH v1 1/3] mali_memory_secure: Kernel 5.0
 onwards 'access_ok' API does not take 'type' as input parameter

'access_ok' no longer needs 'type' as input paramter from kernel 5.0
onwards.

Signed-off-by: Madhurkiran Harikrishnan <madhurkiran.harikrishnan@xilinx.com>
---
 driver/src/devicedrv/mali/linux/mali_ukk_mem.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/driver/src/devicedrv/mali/linux/mali_ukk_mem.c b/driver/src/devicedrv/mali/linux/mali_ukk_mem.c
index 4ec57dc..270bb6d 100644
--- linux/mali_ukk_mem.c
+++ b/linux/mali_ukk_mem.c
@@ -207,8 +207,13 @@ int mem_write_safe_wrapper(struct mali_session_data *session_data, _mali_uk_mem_
 	kargs.ctx = (uintptr_t)session_data;
 
 	/* Check if we can access the buffers */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 0, 0)
+	if (!access_ok((const void __user *)kargs.dest, kargs.size)
+	    || !access_ok((const void __user *)kargs.src, kargs.size)) {
+#else
 	if (!access_ok(VERIFY_WRITE, kargs.dest, kargs.size)
 	    || !access_ok(VERIFY_READ, kargs.src, kargs.size)) {
+#endif
 		return -EINVAL;
 	}
 
@@ -266,7 +271,11 @@ int mem_dump_mmu_page_table_wrapper(struct mali_session_data *session_data, _mal
 		goto err_exit;
 
 	user_buffer = (void __user *)(uintptr_t)kargs.buffer;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 0, 0)
+	if (!access_ok(user_buffer, kargs.size))
+#else
 	if (!access_ok(VERIFY_WRITE, user_buffer, kargs.size))
+#endif
 		goto err_exit;
 
 	/* allocate temporary buffer (kernel side) to store mmu page table info */
-- 
2.7.4