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author	Jiri Slaby <jslaby@suse.cz>
	Tue, 2 Mar 2021 06:22:14 +0000 (07:22 +0100)
committer	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
	Wed, 10 Mar 2021 08:34:09 +0000 (09:34 +0100)
commit	6bfbfcfc58005ee12d37b56a5e722618ef6bee8f
tree	a9cbd9e585a4d35f4df4950968a1dd7082efc7c8	tree \| snapshot
parent	10eb63e5a9b243181f0e87033875f94f3698afda	commit \| diff

tty: make everyone's write_room return >= 0

The tty line disciplines don't expect tty_operations::write_room to
return negative values. Fix the five drivers which violate this.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210302062214.29627-44-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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drivers/staging/gdm724x/gdm_tty.c		diff \| blob \| history
drivers/tty/ipwireless/tty.c		diff \| blob \| history
drivers/tty/n_gsm.c		diff \| blob \| history
drivers/tty/vcc.c		diff \| blob \| history
drivers/usb/serial/mos7720.c		diff \| blob \| history