usb: gadget: add missing MODULE_DESCRIPTION() macros

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 0e151b54aae8..f45d5bedda68 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -2799,5 +2799,6 @@  void usb_composite_overwrite_options(struct usb_composite_dev *cdev,
 }
 EXPORT_SYMBOL_GPL(usb_composite_overwrite_options);
 
+MODULE_DESCRIPTION("infrastructure for Composite USB Gadgets");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("David Brownell");
diff --git a/drivers/usb/gadget/function/f_acm.c b/drivers/usb/gadget/function/f_acm.c
index f616059c5e1e..724b2631f249 100644
--- a/drivers/usb/gadget/function/f_acm.c
+++ b/drivers/usb/gadget/function/f_acm.c
@@ -854,4 +854,5 @@  static struct usb_function_instance *acm_alloc_instance(void)
 	return &opts->func_inst;
 }
 DECLARE_USB_FUNCTION_INIT(acm, acm_alloc_instance, acm_alloc_func);
+MODULE_DESCRIPTION("USB CDC serial (ACM) function driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/usb/gadget/function/f_ecm.c b/drivers/usb/gadget/function/f_ecm.c
index f55f60639e42..6cb7771e8a69 100644
--- a/drivers/usb/gadget/function/f_ecm.c
+++ b/drivers/usb/gadget/function/f_ecm.c
@@ -966,5 +966,6 @@  static struct usb_function *ecm_alloc(struct usb_function_instance *fi)
 }
 
 DECLARE_USB_FUNCTION_INIT(ecm, ecm_alloc_inst, ecm_alloc);
+MODULE_DESCRIPTION("USB CDC Ethernet (ECM) link function driver");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("David Brownell");
diff --git a/drivers/usb/gadget/function/f_eem.c b/drivers/usb/gadget/function/f_eem.c
index 3b445bd88498..6de81ea17274 100644
--- a/drivers/usb/gadget/function/f_eem.c
+++ b/drivers/usb/gadget/function/f_eem.c
@@ -674,5 +674,6 @@  static struct usb_function *eem_alloc(struct usb_function_instance *fi)
 }
 
 DECLARE_USB_FUNCTION_INIT(eem, eem_alloc_inst, eem_alloc);
+MODULE_DESCRIPTION("USB CDC Ethernet (EEM) link function driver");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("David Brownell");
diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index 1f21459b1188..d8b096859337 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -4316,5 +4316,6 @@  static char *ffs_prepare_buffer(const char __user *buf, size_t len)
 }
 
 DECLARE_USB_FUNCTION_INIT(ffs, ffs_alloc_inst, ffs_alloc);
+MODULE_DESCRIPTION("user mode file system API for USB composite function controllers");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Michal Nazarewicz");
diff --git a/drivers/usb/gadget/function/f_hid.c b/drivers/usb/gadget/function/f_hid.c
index 2db01e03bfbf..93dae017ae45 100644
--- a/drivers/usb/gadget/function/f_hid.c
+++ b/drivers/usb/gadget/function/f_hid.c
@@ -1322,6 +1322,7 @@  static struct usb_function *hidg_alloc(struct usb_function_instance *fi)
 }
 
 DECLARE_USB_FUNCTION_INIT(hid, hidg_alloc_inst, hidg_alloc);
+MODULE_DESCRIPTION("USB HID function driver");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Fabien Chouteau");
 
diff --git a/drivers/usb/gadget/function/f_loopback.c b/drivers/usb/gadget/function/f_loopback.c
index 17ac6ace0cff..979b028edb99 100644
--- a/drivers/usb/gadget/function/f_loopback.c
+++ b/drivers/usb/gadget/function/f_loopback.c
@@ -593,4 +593,5 @@  void __exit lb_modexit(void)
 	usb_function_unregister(&Loopbackusb_func);
 }
 
+MODULE_DESCRIPTION("USB peripheral loopback configuration driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/usb/gadget/function/f_mass_storage.c b/drivers/usb/gadget/function/f_mass_storage.c
index c265a1f62fc1..cfd712fd7452 100644
--- a/drivers/usb/gadget/function/f_mass_storage.c
+++ b/drivers/usb/gadget/function/f_mass_storage.c
@@ -3577,6 +3577,7 @@  static struct usb_function *fsg_alloc(struct usb_function_instance *fi)
 }
 
 DECLARE_USB_FUNCTION_INIT(mass_storage, fsg_alloc_inst, fsg_alloc);
+MODULE_DESCRIPTION("Mass Storage USB Composite Function");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Michal Nazarewicz");
 
diff --git a/drivers/usb/gadget/function/f_midi.c b/drivers/usb/gadget/function/f_midi.c
index 20c6fbd94f32..67052a664e74 100644
--- a/drivers/usb/gadget/function/f_midi.c
+++ b/drivers/usb/gadget/function/f_midi.c
@@ -38,6 +38,7 @@ 
 #include "u_midi.h"
 
 MODULE_AUTHOR("Ben Williamson");
+MODULE_DESCRIPTION("USB MIDI class function driver");
 MODULE_LICENSE("GPL v2");
 
 static const char f_midi_shortname[] = "f_midi";
diff --git a/drivers/usb/gadget/function/f_midi2.c b/drivers/usb/gadget/function/f_midi2.c
index ec8cd7c7bbfc..c765f54e613d 100644
--- a/drivers/usb/gadget/function/f_midi2.c
+++ b/drivers/usb/gadget/function/f_midi2.c
@@ -2868,4 +2868,5 @@  static struct usb_function *f_midi2_alloc(struct usb_function_instance *fi)
 
 DECLARE_USB_FUNCTION_INIT(midi2, f_midi2_alloc_inst, f_midi2_alloc);
 
+MODULE_DESCRIPTION("USB MIDI 2.0 class function driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/usb/gadget/function/f_ncm.c b/drivers/usb/gadget/function/f_ncm.c
index 0acc32ed9960..8e761249d672 100644
--- a/drivers/usb/gadget/function/f_ncm.c
+++ b/drivers/usb/gadget/function/f_ncm.c
@@ -1797,5 +1797,6 @@  static struct usb_function *ncm_alloc(struct usb_function_instance *fi)
 }
 
 DECLARE_USB_FUNCTION_INIT(ncm, ncm_alloc_inst, ncm_alloc);
+MODULE_DESCRIPTION("USB CDC Network (NCM) link function driver");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Yauheni Kaliuta");
diff --git a/drivers/usb/gadget/function/f_obex.c b/drivers/usb/gadget/function/f_obex.c
index dcb093210305..1305e2326cdf 100644
--- a/drivers/usb/gadget/function/f_obex.c
+++ b/drivers/usb/gadget/function/f_obex.c
@@ -487,4 +487,5 @@  static struct usb_function *obex_alloc(struct usb_function_instance *fi)
 
 DECLARE_USB_FUNCTION_INIT(obex, obex_alloc_inst, obex_alloc);
 MODULE_AUTHOR("Felipe Balbi");
+MODULE_DESCRIPTION("USB CDC OBEX function driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/usb/gadget/function/f_phonet.c b/drivers/usb/gadget/function/f_phonet.c
index 0bebbdf3f213..0aa9e8224cae 100644
--- a/drivers/usb/gadget/function/f_phonet.c
+++ b/drivers/usb/gadget/function/f_phonet.c
@@ -729,4 +729,5 @@  void gphonet_cleanup(struct net_device *dev)
 
 DECLARE_USB_FUNCTION_INIT(phonet, phonet_alloc_inst, phonet_alloc);
 MODULE_AUTHOR("Rémi Denis-Courmont");
+MODULE_DESCRIPTION("USB CDC Phonet function");
 MODULE_LICENSE("GPL");
diff --git a/drivers/usb/gadget/function/f_printer.c b/drivers/usb/gadget/function/f_printer.c
index ba7d180cc9e6..280a78da26c1 100644
--- a/drivers/usb/gadget/function/f_printer.c
+++ b/drivers/usb/gadget/function/f_printer.c
@@ -1507,6 +1507,7 @@  static struct usb_function *gprinter_alloc(struct usb_function_instance *fi)
 }
 
 DECLARE_USB_FUNCTION_INIT(printer, gprinter_alloc_inst, gprinter_alloc);
+MODULE_DESCRIPTION("USB printer function driver");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Craig Nadler");
 
diff --git a/drivers/usb/gadget/function/f_rndis.c b/drivers/usb/gadget/function/f_rndis.c
index b47f99d17ee9..7cec19d65fb5 100644
--- a/drivers/usb/gadget/function/f_rndis.c
+++ b/drivers/usb/gadget/function/f_rndis.c
@@ -1013,5 +1013,6 @@  static struct usb_function *rndis_alloc(struct usb_function_instance *fi)
 }
 
 DECLARE_USB_FUNCTION_INIT(rndis, rndis_alloc_inst, rndis_alloc);
+MODULE_DESCRIPTION("RNDIS link function driver");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("David Brownell");
diff --git a/drivers/usb/gadget/function/f_serial.c b/drivers/usb/gadget/function/f_serial.c
index 65c50092aea2..8f7e7a2b2ff2 100644
--- a/drivers/usb/gadget/function/f_serial.c
+++ b/drivers/usb/gadget/function/f_serial.c
@@ -392,6 +392,7 @@  static struct usb_function *gser_alloc(struct usb_function_instance *fi)
 }
 
 DECLARE_USB_FUNCTION_INIT(gser, gser_alloc_inst, gser_alloc);
+MODULE_DESCRIPTION("generic USB serial function driver");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Al Borchers");
 MODULE_AUTHOR("David Brownell");
diff --git a/drivers/usb/gadget/function/f_sourcesink.c b/drivers/usb/gadget/function/f_sourcesink.c
index 2edbd9b510d6..6f3702210450 100644
--- a/drivers/usb/gadget/function/f_sourcesink.c
+++ b/drivers/usb/gadget/function/f_sourcesink.c
@@ -1284,4 +1284,5 @@  static void __exit sslb_modexit(void)
 module_init(sslb_modinit);
 module_exit(sslb_modexit);
 
+MODULE_DESCRIPTION("USB peripheral source/sink configuration driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/usb/gadget/function/f_subset.c b/drivers/usb/gadget/function/f_subset.c
index 8ae9689ef2a0..ea3fdd842462 100644
--- a/drivers/usb/gadget/function/f_subset.c
+++ b/drivers/usb/gadget/function/f_subset.c
@@ -500,5 +500,6 @@  static struct usb_function *geth_alloc(struct usb_function_instance *fi)
 }
 
 DECLARE_USB_FUNCTION_INIT(geth, geth_alloc_inst, geth_alloc);
+MODULE_DESCRIPTION("\"CDC Subset\" Ethernet link function driver");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("David Brownell");
diff --git a/drivers/usb/gadget/function/f_tcm.c b/drivers/usb/gadget/function/f_tcm.c
index 37befd6db001..90906d714736 100644
--- a/drivers/usb/gadget/function/f_tcm.c
+++ b/drivers/usb/gadget/function/f_tcm.c
@@ -2301,5 +2301,6 @@  static void __exit tcm_exit(void)
 }
 module_exit(tcm_exit);
 
+MODULE_DESCRIPTION("Target based USB-Gadget");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Sebastian Andrzej Siewior");
diff --git a/drivers/usb/gadget/function/f_uac1.c b/drivers/usb/gadget/function/f_uac1.c
index 7de74a3dd392..2b9fb4daa806 100644
--- a/drivers/usb/gadget/function/f_uac1.c
+++ b/drivers/usb/gadget/function/f_uac1.c
@@ -1823,5 +1823,6 @@  static struct usb_function *f_audio_alloc(struct usb_function_instance *fi)
 }
 
 DECLARE_USB_FUNCTION_INIT(uac1, f_audio_alloc_inst, f_audio_alloc);
+MODULE_DESCRIPTION("USB Audio Class 1.0 Function (using u_audio API)");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Ruslan Bilovol");
diff --git a/drivers/usb/gadget/function/f_uac1_legacy.c b/drivers/usb/gadget/function/f_uac1_legacy.c
index e2d7f69128a0..49cf5aae90ca 100644
--- a/drivers/usb/gadget/function/f_uac1_legacy.c
+++ b/drivers/usb/gadget/function/f_uac1_legacy.c
@@ -1014,5 +1014,6 @@  static struct usb_function *f_audio_alloc(struct usb_function_instance *fi)
 }
 
 DECLARE_USB_FUNCTION_INIT(uac1_legacy, f_audio_alloc_inst, f_audio_alloc);
+MODULE_DESCRIPTION("USB Audio class function driver");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Bryan Wu");
diff --git a/drivers/usb/gadget/function/f_uac2.c b/drivers/usb/gadget/function/f_uac2.c
index 383f6854cfec..f85ffa24a5cd 100644
--- a/drivers/usb/gadget/function/f_uac2.c
+++ b/drivers/usb/gadget/function/f_uac2.c
@@ -2251,6 +2251,7 @@  static struct usb_function *afunc_alloc(struct usb_function_instance *fi)
 }
 
 DECLARE_USB_FUNCTION_INIT(uac2, afunc_alloc_inst, afunc_alloc);
+MODULE_DESCRIPTION("USB Audio Class 2.0 Function");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Yadwinder Singh");
 MODULE_AUTHOR("Jaswinder Singh");
diff --git a/drivers/usb/gadget/function/f_uvc.c b/drivers/usb/gadget/function/f_uvc.c
index 929666805bd2..40187b7112e7 100644
--- a/drivers/usb/gadget/function/f_uvc.c
+++ b/drivers/usb/gadget/function/f_uvc.c
@@ -1118,5 +1118,6 @@  static struct usb_function *uvc_alloc(struct usb_function_instance *fi)
 }
 
 DECLARE_USB_FUNCTION_INIT(uvc, uvc_alloc_inst, uvc_alloc);
+MODULE_DESCRIPTION("USB Video Class Gadget driver");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Laurent Pinchart");
diff --git a/drivers/usb/gadget/function/storage_common.c b/drivers/usb/gadget/function/storage_common.c
index 2a4163b0f6fe..75831f2c7abe 100644
--- a/drivers/usb/gadget/function/storage_common.c
+++ b/drivers/usb/gadget/function/storage_common.c
@@ -537,4 +537,5 @@  ssize_t fsg_store_forced_eject(struct fsg_lun *curlun, struct rw_semaphore *file
 }
 EXPORT_SYMBOL_GPL(fsg_store_forced_eject);
 
+MODULE_DESCRIPTION("Common definitions for mass storage functionality");
 MODULE_LICENSE("GPL");
diff --git a/drivers/usb/gadget/function/u_ether.c b/drivers/usb/gadget/function/u_ether.c
index 11dd0b9e847f..aba8cc621e7e 100644
--- a/drivers/usb/gadget/function/u_ether.c
+++ b/drivers/usb/gadget/function/u_ether.c
@@ -1247,5 +1247,6 @@  void gether_disconnect(struct gether *link)
 }
 EXPORT_SYMBOL_GPL(gether_disconnect);
 
+MODULE_DESCRIPTION("Ethernet-over-USB link layer utilities for Gadget stack");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("David Brownell");
diff --git a/drivers/usb/gadget/function/u_serial.c b/drivers/usb/gadget/function/u_serial.c
index a92eb6d90976..eec7f7a2e40f 100644
--- a/drivers/usb/gadget/function/u_serial.c
+++ b/drivers/usb/gadget/function/u_serial.c
@@ -1536,4 +1536,5 @@  static void __exit userial_cleanup(void)
 }
 module_exit(userial_cleanup);
 
+MODULE_DESCRIPTION("utilities for USB gadget \"serial port\"/TTY support");
 MODULE_LICENSE("GPL");
diff --git a/drivers/usb/gadget/legacy/dbgp.c b/drivers/usb/gadget/legacy/dbgp.c
index b62e45235e8e..d70fb5bc2357 100644
--- a/drivers/usb/gadget/legacy/dbgp.c
+++ b/drivers/usb/gadget/legacy/dbgp.c
@@ -434,6 +434,7 @@  static void __exit dbgp_exit(void)
 }
 
 MODULE_AUTHOR("Stephane Duverger");
+MODULE_DESCRIPTION("EHCI Debug Port device gadget");
 MODULE_LICENSE("GPL");
 module_init(dbgp_init);
 module_exit(dbgp_exit);
diff --git a/drivers/usb/gadget/legacy/gmidi.c b/drivers/usb/gadget/legacy/gmidi.c
index 265c392810d7..e4a419b19f45 100644
--- a/drivers/usb/gadget/legacy/gmidi.c
+++ b/drivers/usb/gadget/legacy/gmidi.c
@@ -31,6 +31,7 @@ 
 /*-------------------------------------------------------------------------*/
 
 MODULE_AUTHOR("Ben Williamson");
+MODULE_DESCRIPTION("USB MIDI Gadget Driver");
 MODULE_LICENSE("GPL v2");
 
 static const char longname[] = "MIDI Gadget";
diff --git a/drivers/usb/gadget/legacy/zero.c b/drivers/usb/gadget/legacy/zero.c
index 23312a07efb4..e25e0d8dd387 100644
--- a/drivers/usb/gadget/legacy/zero.c
+++ b/drivers/usb/gadget/legacy/zero.c
@@ -425,4 +425,5 @@  static struct usb_composite_driver zero_driver = {
 module_usb_composite_driver(zero_driver);
 
 MODULE_AUTHOR("David Brownell");
+MODULE_DESCRIPTION("Gadget Zero, for USB development");
 MODULE_LICENSE("GPL");