netdev - RE: [PATCH net-next v2 2/4] can: cc770: add legacy ISA bus driver for the CC770 and AN82527

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Date:	Tue, 10 Jan 2012 10:00:49 -0000
From:	"David Laight" <David.Laight@...LAB.COM>
To:	<info@...ax.com>, "Wolfgang Grandegger" <wg@...ndegger.com>,
	"Oliver Hartkopp" <socketcan@...tkopp.net>, <henrik@...conx.com>
Cc:	<netdev@...r.kernel.org>, <linux-can@...r.kernel.org>,
	<socketcan-users@...ts.berlios.de>, "IreneV" <boir1@...dex.ru>,
	"Stanislav Yelenskiy" <stanislavelensky@...oo.com>, <oe@...t.de>,
	<henrik@...us-sw.com>
Subject: RE: [PATCH net-next v2 2/4] can: cc770: add legacy ISA bus driver for the CC770 and AN82527

 
> cc770_isa_port_write_reg_indirect(const struct cc770_priv *priv,
>   						int reg, u8 val)
>   {
>   	unsigned long base = (unsigned long)priv->reg_base;
> +	unsigned long flags;
> 
> +	spin_lock_irqsave( &outb_lock, flags);
>   	outb(reg, base);
>   	outb(val, base + 1);
> +	spin_unlock_irqrestore( &outb_lock, flags);	

Is there a 'read_reg_indirect' function??
If so it also needs to use the same mutex.
I'd double check all references to the 'reg_base' field.

	David


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