715b1dc01f
The usb_debug driver, when used as the console, will always fail to insert the carriage return and new line sequence as well as randomly drop console output. This is a result of only having the single write_urb and that the tty layer will have a lock that prevents the processing of the back to back urb requests. The solution is to allow more than one urb to be outstanding and have a slightly deeper transmit queue. The idea and some code is borrowed from the ftdi_sio usb driver. The generic usb serial driver was modified so as to allow the classic method of 1 write urb, or a multi write urb scheme with N allowed outstanding urbs where N is controlled by max_in_flight_urbs. When max_in_flight_urbs in a "struct usb_serial_driver" is non zero the multi write urb scheme will be used. The size of 4000 was selected for the usb_debug driver so that the driver lowers possibility of losing the queued console messages during the kernel startup. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> |
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| .. | ||
| association.h | ||
| atmel_usba_udc.h | ||
| audio.h | ||
| c67x00.h | ||
| cdc.h | ||
| ch9.h | ||
| composite.h | ||
| ehci_def.h | ||
| g_printer.h | ||
| gadget.h | ||
| gadgetfs.h | ||
| gpio_vbus.h | ||
| input.h | ||
| iowarrior.h | ||
| irda.h | ||
| isp116x.h | ||
| Kbuild | ||
| midi.h | ||
| musb.h | ||
| net2280.h | ||
| otg.h | ||
| quirks.h | ||
| rndis_host.h | ||
| serial.h | ||
| sl811.h | ||
| tmc.h | ||
| usbnet.h | ||
| vstusb.h | ||
| wusb-wa.h | ||
| wusb.h | ||