linux-kernel - Re: Incorrect uses of get_driver()/put

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Message-ID: <20120109210733.17ae0983@milhouse>
Date:	Mon, 9 Jan 2012 21:07:33 +0100
From:	Michael Büsch <m@...s.ch>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Joerg Roedel <joerg.roedel@....com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Kernel development list <linux-kernel@...r.kernel.org>
Subject: Re: Incorrect uses of get_driver()/put_driver()

On Mon, 9 Jan 2012 14:48:15 -0500 (EST)
Alan Stern <stern@...land.harvard.edu> wrote:

> Maybe you want to call device_lock(&sdev->dev) here?  It will prevent
> the driver from being unbound (and therefore from being unloaded), and
> it's likely that sdrv's remove and probe routines expect to be called
> with this lock held, because that's what the device core does.  The
> drawback is that holding the lock prevents other things from happening
> as well, like unregistering sdev.
> 
> Alternatively, we can simply remove ssb_driver_get/put.

I think in practice it doesn't matter. This function is only
used in the rare case where the EEPROM on the board is written.

-- 
Greetings, Michael.
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