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defendkey: change defendkey read function process [1/1]

Browse Source 
PD#SWPL-3204

Problem:
GXL: need to fix bug for defendkey read function

Solution:
1.change defendkey read function process

Verify:
GXL skt board verify pass

Change-Id: I61c7e7074eefa1ab20bdb8fa31f970b39bfe5a1b
Signed-off-by: Zhongfu Luo <zhongfu.luo@amlogic.com>
This commit is contained in:
Zhongfu Luo
2018-12-29 13:12:08 +08:00
committed by Dongjin Kim
parent 57b78ecf46
commit 2a66e72ef3
1 changed files with 15 additions and 24 deletions
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39
drivers/amlogic/defendkey/defendkey.c
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@@ -135,15 +135,11 @@ static long defendkey_compat_ioctl(struct file *filp,
static ssize_t defendkey_read(struct file *file,
char __user *buf, size_t count, loff_t *ppos)
{
int ret;
unsigned long copy_base, copy_size, mem_base_phy, check_offset;
ssize_t ret_value = ret_error;
int ret = -EINVAL;
unsigned long mem_base_phy, check_offset;
switch (decrypt_dtb) {
case e_upgrade_check:
case e_decrypt_dtb:
return ret_error;
case e_decrypt_dtb_success:
{
if (decrypt_dtb == e_decrypt_dtb_success) {
mem_base_phy = virt_to_phys(mem_base_virt);
check_offset = aml_sec_boot_check(AML_D_Q_IMG_SIG_HDR_SIZE,
@@ -153,35 +149,30 @@ static ssize_t defendkey_read(struct file *file,
else
check_offset = 0;
if (check_offset)
memmove((void *)mem_base_virt,
(void *)mem_base_virt + check_offset, mem_size);
if (mem_size < count) {
pr_err("%s:data size overflow!\n", __func__);
return ret_fail;
ret_value = ret_fail;
goto exit;
}
copy_base = (unsigned long)buf;
copy_size = count;
ret = copy_to_user((void __user *)copy_base,
(const void *)mem_base_virt, copy_size);
ret = copy_to_user((void __user *)buf,
(const void *)(mem_base_virt + check_offset), count);
if (ret) {
pr_err("%s:copy_to_user fail! ret:%d\n",
__func__, ret);
ret = ret_fail;
ret_value = ret_fail;
} else {
pr_info("%s: copy data to user successfully!\n",
__func__);
ret = ret_success;
ret_value = ret_success;
}
}
default:
return ret_error;
}
decrypt_dtb = e_upgrade_check;
} else
ret_value = ret_error;
return ret;
exit:
return ret_value;
}
static ssize_t defendkey_write(struct file *file,