From: Tobias Klauser <tklauser@distanz.ch>
Date: Mon, 28 Mar 2011 11:57:11 +0000 (+0200)
Subject: serial: altera_uart: Scan for a free port if platform device id is -1
X-Git-Tag: v3.0-rc1~338^2~32
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a664ec9675d77aa2196e797afa5516d3e476da77;p=pandora-kernel.git

serial: altera_uart: Scan for a free port if platform device id is -1

Devices extracted from device tree all seem to have pdev->id set to -1.
Up until now we mapped all devices with id -1 to the first device.  This
behaviour could lead to problems when using more than one Altera UART in
a system.

This patch changes the behaviour of the driver to scan for the next free
id in case the id is -1.

Because we cannot refer back to the assigned id in altera_uart_remove,
the port instance needs to be stored in device drvdata.

Reported-by: David Smoot <davidsmoot@gmail.com>
Cc: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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