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freebsd-dev/sys/dev/usb/serial
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Hans Petter Selasky f83f5d5839 Send a zero-length-packet first when opening a BULK endpoint for USB serial 
port devices. If it gets eaten it is fine. Many USB device side implementations
don't properly support the clear endpoint halt command and if they do, data is lost
because the transmit FIFO is typically reset when this command is received.

Tested by:	jmg
MFC after:	1 week
Sponsored by:	NVIDIA Networking
2021-07-15 12:11:53 +02:00
..
u3g.c Send a zero-length-packet first when opening a BULK endpoint for USB serial 2021-07-15 12:11:53 +02:00
uark.c Send a zero-length-packet first when opening a BULK endpoint for USB serial 2021-07-15 12:11:53 +02:00
ubsa.c Send a zero-length-packet first when opening a BULK endpoint for USB serial 2021-07-15 12:11:53 +02:00
ubser.c Send a zero-length-packet first when opening a BULK endpoint for USB serial 2021-07-15 12:11:53 +02:00
uchcom.c Send a zero-length-packet first when opening a BULK endpoint for USB serial 2021-07-15 12:11:53 +02:00
ucycom.c hid: Chase for HID function name changes in existing USB HID drivers 2021-01-08 02:18:42 +03:00
ufoma.c Send a zero-length-packet first when opening a BULK endpoint for USB serial 2021-07-15 12:11:53 +02:00
uftdi_reg.h
uftdi.c Send a zero-length-packet first when opening a BULK endpoint for USB serial 2021-07-15 12:11:53 +02:00
ugensa.c Send a zero-length-packet first when opening a BULK endpoint for USB serial 2021-07-15 12:11:53 +02:00
uipaq.c Send a zero-length-packet first when opening a BULK endpoint for USB serial 2021-07-15 12:11:53 +02:00
ulpt.c Send a zero-length-packet first when opening a BULK endpoint for USB serial 2021-07-15 12:11:53 +02:00
umcs.c Send a zero-length-packet first when opening a BULK endpoint for USB serial 2021-07-15 12:11:53 +02:00
umcs.h
umct.c usb: tiny formatting nit 2021-03-11 08:24:13 -07:00
umodem.c Send a zero-length-packet first when opening a BULK endpoint for USB serial 2021-07-15 12:11:53 +02:00
umoscom.c Send a zero-length-packet first when opening a BULK endpoint for USB serial 2021-07-15 12:11:53 +02:00
uplcom.c Send a zero-length-packet first when opening a BULK endpoint for USB serial 2021-07-15 12:11:53 +02:00
usb_serial.c usb: clean up empty lines in .c and .h files 2020-09-01 21:26:44 +00:00
usb_serial.h
uslcom.c Send a zero-length-packet first when opening a BULK endpoint for USB serial 2021-07-15 12:11:53 +02:00
uvisor.c usb: clean up empty lines in .c and .h files 2020-09-01 21:26:44 +00:00
uvscom.c Send a zero-length-packet first when opening a BULK endpoint for USB serial 2021-07-15 12:11:53 +02:00