unifykey: add helper API so we can call unifykey APIs from drivers [4/5]

PD#165222: crash if call unifykey APIs from other drivers

example to call unifykey APIs from kernel space:

  ret = key_unify_query(get_ukdev(), key_name, &key_exist, &keypermit);

Change-Id: I2e7f6cdad21c9faa4d95d0536b187ece485a5b46
Signed-off-by: jiamin ma <jiamin.ma@amlogic.com>

diff --git a/drivers/amlogic/unifykey/unifykey.c b/drivers/amlogic/unifykey/unifykey.c
index 0d0bd83..74ca4ae 100644 (file)
--- a/drivers/amlogic/unifykey/unifykey.c
+++ b/drivers/amlogic/unifykey/unifykey.c
@@ -56,6 +56,7 @@ typedef int (*key_unify_dev_init)(struct key_info_t *uk_info,
 typedef int (*key_unify_dev_uninit)(void);
 
 static int module_init_flag;
+static struct aml_unifykey_dev *ukdev_global;
 
 static char hex_to_asc(char para)
 {
@@ -899,6 +900,11 @@ static long unifykey_compat_ioctl(struct file *file,
 }
 #endif
 
+void  *get_ukdev(void)
+{
+       return ukdev_global;
+}
+
 static ssize_t unifykey_read(struct file *file,
        char __user *buf,
        size_t count,
@@ -1523,6 +1529,7 @@ static int aml_unifykeys_probe(struct platform_device *pdev)
                ret = -ENOMEM;
                goto out;
        }
+       ukdev_global = ukdev;
        ukdev->pdev = pdev;
        platform_set_drvdata(pdev, ukdev);
 

diff --git a/include/linux/amlogic/unifykey/key_manage.h b/include/linux/amlogic/unifykey/key_manage.h
index eee15df..d56f73f 100644 (file)
--- a/include/linux/amlogic/unifykey/key_manage.h
+++ b/include/linux/amlogic/unifykey/key_manage.h
@@ -34,4 +34,6 @@ void storage_ops_write(store_key_ops read)
 }
 #endif /*CONFIG_KEY_MANAGE*/
 
+void  *get_ukdev(void);
+
 #endif /*__KEYMANAGE1__*/