diff --git a/drivers/usb/serial/aircable.c b/drivers/usb/serial/aircable.c
index 1a1a6b832451b6c6173d2b6d3fe4d81f1c2cf4a4..84d52953dd0a1df9f60bb0c0d008269639cdbd62 100644
--- a/drivers/usb/serial/aircable.c
+++ b/drivers/usb/serial/aircable.c
@@ -158,4 +158,4 @@ module_usb_serial_driver(serial_drivers, id_table);
 
 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c
index 06a1e4e63cc488fee064fdd8a8451b9525ad4f21..bdd7a5ad3bf1c0060bcef8a3a1dc640b4a45cbcc 100644
--- a/drivers/usb/serial/ch341.c
+++ b/drivers/usb/serial/ch341.c
@@ -641,4 +641,4 @@ static struct usb_serial_driver * const serial_drivers[] = {
 
 module_usb_serial_driver(serial_drivers, id_table);
 
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
index ca5977a52f34e125fe6cc6a15c061f628308830b..7c6273bf5bebcfff7b573c23659ef2da219bd29d 100644
--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c
@@ -1526,4 +1526,4 @@ static void cp210x_release(struct usb_serial *serial)
 module_usb_serial_driver(serial_drivers, id_table);
 
 MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/serial/empeg.c b/drivers/usb/serial/empeg.c
index d9f2bb37e4cdf339b84c57493871a5bccdddca3c..d680bec62547e1da945be2982c6d4d056324303c 100644
--- a/drivers/usb/serial/empeg.c
+++ b/drivers/usb/serial/empeg.c
@@ -123,4 +123,4 @@ module_usb_serial_driver(serial_drivers, id_table);
 
 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/serial/metro-usb.c b/drivers/usb/serial/metro-usb.c
index 2832810c96930f5a65e6ee4c712579f17305616b..e63cea02cfd83af0c48078a1a135688c29d7cd18 100644
--- a/drivers/usb/serial/metro-usb.c
+++ b/drivers/usb/serial/metro-usb.c
@@ -368,7 +368,7 @@ static struct usb_serial_driver * const serial_drivers[] = {
 
 module_usb_serial_driver(serial_drivers, id_table);
 
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
 MODULE_AUTHOR("Philip Nicastro");
 MODULE_AUTHOR("Aleksey Babahin <tamerlan311@gmail.com>");
 MODULE_DESCRIPTION(DRIVER_DESC);
diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c
index 553c74d7ca2a0b01233909a4dcbc3ab14b6ef58c..f4df3d5bf69c3f421de16c07c713f6d278f905cc 100644
--- a/drivers/usb/serial/mos7720.c
+++ b/drivers/usb/serial/mos7720.c
@@ -2040,4 +2040,4 @@ module_usb_serial_driver(serial_drivers, id_table);
 
 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/serial/navman.c b/drivers/usb/serial/navman.c
index 7afb9fc479b47a3b0502e6185b04470b57770ada..20277c52dded6b117f296bd7ee5e12a59155d2f5 100644
--- a/drivers/usb/serial/navman.c
+++ b/drivers/usb/serial/navman.c
@@ -112,4 +112,4 @@ static struct usb_serial_driver * const serial_drivers[] = {
 
 module_usb_serial_driver(serial_drivers, id_table);
 
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/serial/omninet.c b/drivers/usb/serial/omninet.c
index 13d15a0b5e1f0e192ba84601dcefa9839025acc1..e51c9464ea4267281f2fff3cf830603e49bc3d46 100644
--- a/drivers/usb/serial/omninet.c
+++ b/drivers/usb/serial/omninet.c
@@ -176,4 +176,4 @@ module_usb_serial_driver(serial_drivers, id_table);
 
 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/serial/opticon.c b/drivers/usb/serial/opticon.c
index fd9d8aa34353070e8dd62920d5ca9ac7b7fee898..caa0746326fd52cd30734078938a9b7031b96746 100644
--- a/drivers/usb/serial/opticon.c
+++ b/drivers/usb/serial/opticon.c
@@ -417,4 +417,4 @@ static struct usb_serial_driver * const serial_drivers[] = {
 module_usb_serial_driver(serial_drivers, id_table);
 
 MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index f576397b1fe97174983a43d6a1b37926e2123225..aaa7d901a06de68a7902bbba02707ec29d6bcbd5 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -2203,4 +2203,4 @@ static void option_instat_callback(struct urb *urb)
 
 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/serial/oti6858.c b/drivers/usb/serial/oti6858.c
index bbde22c99cb34319560affeb1f4ceadc5671ee73..ae9cb15ee02dce660cf0aa5da2a8d31268bca878 100644
--- a/drivers/usb/serial/oti6858.c
+++ b/drivers/usb/serial/oti6858.c
@@ -844,4 +844,4 @@ module_usb_serial_driver(serial_drivers, id_table);
 
 MODULE_DESCRIPTION(OTI6858_DESCRIPTION);
 MODULE_AUTHOR(OTI6858_AUTHOR);
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 71fbf2ff1fc3a06873c53cbb5c7816968fdeaf18..57ae832a49ffffdda668b9f964f316cf1b2befe5 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -1022,4 +1022,4 @@ static struct usb_serial_driver * const serial_drivers[] = {
 module_usb_serial_driver(serial_drivers, id_table);
 
 MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver");
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/serial/qcaux.c b/drivers/usb/serial/qcaux.c
index 5078f79bc5a4a7d48232879e6e26fda1229a0aea..929ffba663f2035fbaf1f46c8bb3de9495fa4daa 100644
--- a/drivers/usb/serial/qcaux.c
+++ b/drivers/usb/serial/qcaux.c
@@ -84,4 +84,4 @@ static struct usb_serial_driver * const serial_drivers[] = {
 };
 
 module_usb_serial_driver(serial_drivers, id_table);
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/serial/quatech2.c b/drivers/usb/serial/quatech2.c
index 804734dd88a0f43932d5d34f6b3eff189f55b605..958e12e1e7c7213d936bf0182b8bf30c14cb51ed 100644
--- a/drivers/usb/serial/quatech2.c
+++ b/drivers/usb/serial/quatech2.c
@@ -1023,4 +1023,4 @@ static struct usb_serial_driver *const serial_drivers[] = {
 module_usb_serial_driver(serial_drivers, id_table);
 
 MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index 276f055a2925287d100aa26599cd607134d1ce35..d189f953c89172574eb8db208b0056aaa524a665 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -1075,7 +1075,7 @@ module_usb_serial_driver(serial_drivers, id_table);
 
 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
 
 module_param(nmea, bool, S_IRUGO | S_IWUSR);
 MODULE_PARM_DESC(nmea, "NMEA streaming");
diff --git a/drivers/usb/serial/ssu100.c b/drivers/usb/serial/ssu100.c
index a7db9aff97a1fff30e330653076cc9099fbd2832..2083c267787b217e115e15e23044a0656092a1d0 100644
--- a/drivers/usb/serial/ssu100.c
+++ b/drivers/usb/serial/ssu100.c
@@ -577,4 +577,4 @@ static struct usb_serial_driver * const serial_drivers[] = {
 module_usb_serial_driver(serial_drivers, id_table);
 
 MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/serial/symbolserial.c b/drivers/usb/serial/symbolserial.c
index c47d3a0cd4cf97137238ab211ec07e72c4a436fc..cd2f8dc8b58c68505cc6c2019c7509adde01c367 100644
--- a/drivers/usb/serial/symbolserial.c
+++ b/drivers/usb/serial/symbolserial.c
@@ -191,4 +191,4 @@ static struct usb_serial_driver * const serial_drivers[] = {
 
 module_usb_serial_driver(serial_drivers, id_table);
 
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/serial/usb-serial-simple.c b/drivers/usb/serial/usb-serial-simple.c
index 2fc92d1d3c41ec071d15941905a2f6e0f5eeec37..74172fe158df9438af2ae1b3f771b26b1f0f9615 100644
--- a/drivers/usb/serial/usb-serial-simple.c
+++ b/drivers/usb/serial/usb-serial-simple.c
@@ -131,4 +131,4 @@ static const struct usb_device_id id_table[] = {
 MODULE_DEVICE_TABLE(usb, id_table);
 
 module_usb_serial_driver(serial_drivers, id_table);
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 38291c6e57ed030073a7301ec23ad8fd7442f54c..790e0cbe3da9ee3f6ca3f5d25d08cb1a1c38f297 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -1435,4 +1435,4 @@ EXPORT_SYMBOL_GPL(usb_serial_deregister_drivers);
 
 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/serial/usb_debug.c b/drivers/usb/serial/usb_debug.c
index d2806714240688cb04cf2d240bde537868777874..a657c6ec00bbcdecf2831cd9a56c85a1177a92e1 100644
--- a/drivers/usb/serial/usb_debug.c
+++ b/drivers/usb/serial/usb_debug.c
@@ -95,4 +95,4 @@ static struct usb_serial_driver * const serial_drivers[] = {
 };
 
 module_usb_serial_driver(serial_drivers, id_table_combined);
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c
index f9c7228689357ea8f97b2a02f4e365e836136cb6..107e64c42e942d04b41f531764294b8f94f34dcd 100644
--- a/drivers/usb/serial/usb_wwan.c
+++ b/drivers/usb/serial/usb_wwan.c
@@ -720,4 +720,4 @@ EXPORT_SYMBOL(usb_wwan_resume);
 
 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/serial/visor.c b/drivers/usb/serial/visor.c
index cf6ba37092fb2eb2b6a6a658f82684892ceaeef0..f5373ed2cd455dbb0e58fa81aba7338b6fbf22f0 100644
--- a/drivers/usb/serial/visor.c
+++ b/drivers/usb/serial/visor.c
@@ -576,4 +576,4 @@ module_usb_serial_driver(serial_drivers, id_table_combined);
 
 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/serial/xsens_mt.c b/drivers/usb/serial/xsens_mt.c
index 7608323d62c53cf11b144ab1a4a70e14f5e710cc..cf262c9a963823503b9f600f0a3d0dac2ef942a4 100644
--- a/drivers/usb/serial/xsens_mt.c
+++ b/drivers/usb/serial/xsens_mt.c
@@ -66,4 +66,4 @@ module_usb_serial_driver(serial_drivers, id_table);
 
 MODULE_AUTHOR("Frans Klaver <frans.klaver@xsens.com>");
 MODULE_DESCRIPTION("USB-serial driver for Xsens motion trackers");
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");