linux-kernel - Re: [RFC 02/11] i2c: add quirk checks to core

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Message-ID: <20150112120814.GE12302@n2100.arm.linux.org.uk>
Date:	Mon, 12 Jan 2015 12:08:14 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Wolfram Sang <wsa@...-dreams.de>
Cc:	linux-i2c@...r.kernel.org, linux-mips@...ux-mips.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	linux-kernel@...r.kernel.org,
	Ludovic Desroches <ludovic.desroches@...el.com>,
	Yingjoe Chen <yingjoe.chen@...iatek.com>,
	linuxppc-dev@...ts.ozlabs.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [RFC 02/11] i2c: add quirk checks to core

On Fri, Jan 09, 2015 at 06:21:32PM +0100, Wolfram Sang wrote:
> +static int i2c_quirk_error(struct i2c_adapter *adap, struct i2c_msg *msg, char *err_msg)
> +{
> +	dev_err(&adap->dev, "quirk: %s (addr 0x%04x, size %u)\n", err_msg, msg->addr, msg->len);
> +	return -EOPNOTSUPP;
> +}

So, what happens if I open an I2C adapter, find a message which causes
i2c_quirk_error() to be called, and then spin repeatedly calling that...
Shouldn't there be some rate limiting to this?

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