linux-kernel - Re: [PATCH 38/76] tty: usb-serial krefs

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Message-ID: <20081006053658.GA26817@kroah.com>
Date:	Sun, 5 Oct 2008 22:36:58 -0700
From:	Greg KH <greg@...ah.com>
To:	Alan Cox <alan@...hat.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 38/76] tty: usb-serial krefs

On Sun, Oct 05, 2008 at 05:11:38PM +0100, Alan Cox wrote:
> Use kref in the USB serial drivers so that we don't free tty structures
> from under the URB receive handlers as has historically been the case if
> you were unlucky. This also gives us a framework for general tty drivers to
> use tty_port objects and refcount.

Should we be calling kref_get() and kref_put() in interrupt context?
Could we just get the reference in open and then put in close when we
are done with it for each driver?

thanks,

greg k-h
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