openwrt trunk源码增加补丁编译错误

MT7620Wifi

Applying ./patches/020-disable_tty_set_termios.patch using plaintext:
can't find file to patch at input line 3
Perhaps you used the wrong -p or --strip option?
The text leading up to this was:
--------------------------
|--- a/compat/compat-2.6.39.c
|+++ b/compat/compat-2.6.39.c
--------------------------
No file to patch.  Skipping patch.
2 out of 2 hunks ignored
Patch failed!  Please fix ./patches/020-disable_tty_set_termios.patch!
Makefile:2120: recipe for target '/opt/trunk/build_dir/target-mipsel_24kec+dsp_musl-1.1.11/linux-ramips_mt7620/compat-wireless-2015-07-21/.prepared_6cb09f09840cfc5792e8e8869477c81a' failed
make[3]: *** [/opt/trunk/build_dir/target-mipsel_24kec+dsp_musl-1.1.11/linux-ramips_mt7620/compat-wireless-2015-07-21/.prepared_6cb09f09840cfc5792e8e8869477c81a] Error 1
make[3]: Leaving directory '/opt/trunk/package/kernel/mac80211'
package/Makefile:191: recipe for target 'package/kernel/mac80211/compile' failed
make[2]: *** [package/kernel/mac80211/compile] Error 2
make[2]: Leaving directory '/opt/trunk'
package/Makefile:188: recipe for target '/opt/trunk/staging_dir/target-mipsel_24kec+dsp_musl-1.1.11/stamp/.package_compile' failed
make[1]: *** [/opt/trunk/staging_dir/target-mipsel_24kec+dsp_musl-1.1.11/stamp/.package_compile] Error 2
make[1]: Leaving directory '/opt/trunk'
/opt/trunk/include/toplevel.mk:179: recipe for target 'world' failed
make: *** [world] Error 2

455464351

我也是这个问题，请教大神！！