From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Fri, 5 Sep 2014 19:02:36 +0000 (+0200)
Subject: tty: serial: 8250_core: provide a function to export uart_8250_port
X-Git-Tag: fixes-for-v3.18-merge-window~14^2~52
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ae14a7954f5124208e6e93cafb3099f83acd43f5;p=pandora-kernel.git

tty: serial: 8250_core: provide a function to export uart_8250_port

There is no way to access a struct uart_8250_port for a specific
line. This is only required outside of the 8250/uart callbacks like for
devices' suspend & remove callbacks. For those the 8250-core provides a
wrapper like serial8250_unregister_port() which passes the struct
to the proper function based on the line argument.

For run time suspend I need access to this struct not only to make
serial_out() work but also to properly restore up->ier and up->mcr.

Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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