• Jason Wessel's avatar
    tty_port,usb-console: Fix usb serial console open/close regression · 336cee42
    Jason Wessel authored
    Commit e1108a63 ("usb_serial: Use the
    shutdown() operation") breaks the ability to use a usb console
    starting in 2.6.33.  This was observed when using
    console=ttyUSB0,115200 as a boot argument with an FTDI device.  The
    error is:
    
    ftdi_sio ttyUSB0: ftdi_submit_read_urb - failed submitting read urb, error -22
    
    The handling of the ASYNCB_INITIALIZED changed in 2.6.32 such that in
    tty_port_shutdown() it always clears the flag if it is set.  The fix
    is to add a variable to the tty_port struct to indicate when the tty
    port is a console.
    
    CC: Alan Cox <alan@linux.intel.com>
    CC: Alan Stern <stern@rowland.harvard.edu>
    CC: Oliver Neukum <oliver@neukum.org>
    CC: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarJason Wessel <jason.wessel@windriver.com>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
    336cee42
tty_port.c 11.2 KB