From: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
To: Manfred Spraul <manfred@colorfullife.com>,
linux-usb-devel@lists.sourceforge.net, greg@kroah.com,
linux-kernel@vger.kernel.org
Subject: Re: usb storage cleanup
Date: Thu, 4 Jul 2002 16:54:32 -0300 [thread overview]
Message-ID: <20020704195432.GD7534@conectiva.com.br> (raw)
In-Reply-To: <20020704125012.C17360@one-eyed-alien.net>
Em Thu, Jul 04, 2002 at 12:50:12PM -0700, Matthew Dharm escreveu:
> > > Because relying on a pointer has caused problems in the past, especially
> > > when there are concerns that the pointer might be invalid.
> > Could you explain a bit more? How could the pointer become invalid?
> There was a large discussion of this in relation to another driver on
> linux-usb-devel... basically, the pointer is just an address to a structure
> owned by an HCD... it's entirely possible for the structure to go away on
> us unexpectedly. We _should_ get the notification via the _disconnect()
> call, but real-world experience showed us that this wasn't always
> happening.
Humm, I believed that USB was using refcounting
- Arnaldo
next prev parent reply other threads:[~2002-07-04 19:52 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-03 21:14 usb storage cleanup Manfred Spraul
2002-07-03 21:43 ` Matthew Dharm
2002-07-03 22:19 ` Manfred Spraul
2002-07-04 0:05 ` Matthew Dharm
2002-07-04 17:12 ` Manfred Spraul
2002-07-04 19:50 ` Matthew Dharm
2002-07-04 19:54 ` Arnaldo Carvalho de Melo [this message]
2002-07-04 20:02 ` Greg KH
2002-07-04 20:23 ` [linux-usb-devel] " David Brownell
2002-07-04 21:16 ` Matthew Dharm
2002-07-04 22:05 ` David Brownell
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