lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <e9c3a7c20903171002n50964148v8366fa2f00e3164c@mail.gmail.com>
Date:	Tue, 17 Mar 2009 10:02:14 -0700
From:	Dan Williams <dan.j.williams@...el.com>
To:	Atsushi Nemoto <anemo@....ocn.ne.jp>
Cc:	linux-mips@...ux-mips.org, ralf@...ux-mips.org,
	linux-kernel@...r.kernel.org, haavard.skinnemoen@...el.com
Subject: Re: [PATCH 1/2] dmaengine: TXx9 Soc DMA Controller driver

On Tue, Mar 17, 2009 at 9:09 AM, Atsushi Nemoto <anemo@....ocn.ne.jp> wrote:
> On Mon, 16 Mar 2009 21:52:10 -0700, Dan Williams <dan.j.williams@...el.com> wrote:
>> > Hmm.. why idr_ref is dynamically allocated?  Just putting it in
>> > dma_device makes thing more simple, no?
>>
>> The sysfs device has a longer lifetime than dma_device.  See commit
>> 41d5e59c [1].
>
> The sysfs device for dma_chan (dma_chan_dev) has a shorter lifetime
> than dma_device, doesn't it?

No,  dma_async_device_unregister(), and the freeing of dma_device, may
finish before chan_dev_release is called.  Userspace gates the final
release of dma_chan_dev objects.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ