linux-kernel - Re: [PATCH] fujtisu application panel driver

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Message-ID: <20070705012929.GA4728@aurum.uhlenkott.net>
Date:	Wed, 4 Jul 2007 18:29:29 -0700
From:	Jason Uhlenkott <jasonuhl@...onuhl.org>
To:	Stephen Hemminger <shemminger@...ux-foundation.org>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Len Brown <lenb@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-input@...ey.karlin.mff.cuni.cz, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fujtisu application panel driver

On Mon, Jul 02, 2007 at 11:17:24 -0700, Stephen Hemminger wrote:
> +static int __init apanel_init(void)
> +{
> +	void __iomem *bios;
> +	u8 devno;
> +	int found = 0;
> +
> +	if (!dmi_check_system(apanel_dmi_table)) {
> +		printk(KERN_WARNING "apanel: DMI information does not match\n");
> +		if (!force)
> +			return -ENODEV;
> +	}
> +	BUG_ON(!keymap);

If force=1 and there's no DMI match, we're guaranteed to pop this BUG_ON.

> +
> +			device_chip[devno] = (enum apanel_chip) chip;
> +			++found;
> +		}
> +	}
> +	iounmap(bios);

This isn't the address we got from ioremap (although it happens to
work, since iounmap internally masks it against PAGE_MASK).
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