diff --git a/study/problem/port/ioctl/README.md b/study/problem/port/ioctl/README.md
index ad064d4..5414b1e 100644
--- a/study/problem/port/ioctl/README.md
+++ b/study/problem/port/ioctl/README.md
@@ -5,7 +5,7 @@
 
 | CSDN | GitHub |
 |:----:|:------:|
-| [内核新的ioctl方式--unlocked_ioctl和compat_ioctl<br>解决error:unknown field 'ioctl' specified in initializer](http://blog.csdn.net/gatieme/article/details/71437163) | [`LDD/problem/port/ioctl`](https://github.com/gatieme/LDD-LinuxDeviceDrivers/study/problem/port/ioctl) |
+| [内核新的ioctl方式--unlocked_ioctl和compat_ioctl<br>解决error:unknown field 'ioctl' specified in initializer](http://blog.csdn.net/gatieme/article/details/71437163) | [`LDD/problem/port/ioctl`](https://github.com/gatieme/LDD-LinuxDeviceDrivers/tree/master/study/problem/port/ioctl) |