From: Greg KH <gregkh@suse.de>
To: linux-kernel@vger.kernel.org, stable@kernel.org
Cc: Justin Forbes <jmforbes@linuxtx.org>,
Zwane Mwaikambo <zwane@arm.linux.org.uk>,
"Theodore Ts'o" <tytso@mit.edu>,
Randy Dunlap <rdunlap@xenotime.net>,
Dave Jones <davej@redhat.com>,
Chuck Wolber <chuckw@quantumlinux.com>,
Chris Wedgwood <reviews@ml.cw.f00f.org>,
Michael Krufky <mkrufky@linuxtv.org>,
Chuck Ebbert <cebbert@redhat.com>,
Domenico Andreoli <cavokz@gmail.com>, Willy Tarreau <w@1wt.eu>,
Rodrigo Rubira Branco <rbranco@la.checkpoint.com>,
Jake Edge <jake@lwn.net>, Eugene Teo <eteo@redhat.com>,
torvalds@linux-foundation.org, akpm@linux-foundation.org,
alan@lxorguk.ukuu.org.uk,
Maciej Sosnowski <maciej.sosnowski@intel.com>,
Dan Williams <dan.j.williams@intel.com>
Subject: [patch 08/21] dmaengine: protect id from concurrent registrations
Date: Mon, 12 Jan 2009 17:27:04 -0800 [thread overview]
Message-ID: <20090113012704.GI4512@kroah.com> (raw)
In-Reply-To: <20090113012633.GA4512@kroah.com>
[-- Attachment #1: dmaengine-protect-id-from-concurrent-registrations.patch --]
[-- Type: text/plain, Size: 922 bytes --]
2.6.27-stable review patch. If anyone has any objections, please let us know.
------------------
From: Dan Williams <dan.j.williams@intel.com>
commit b0b42b16ff2b90f17bc1a4308366c9beba4b276e upstream.
There is a possibility to have two devices registered with the same id.
Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/dma/dmaengine.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -388,7 +388,10 @@ int dma_async_device_register(struct dma
init_completion(&device->done);
kref_init(&device->refcount);
+
+ mutex_lock(&dma_list_mutex);
device->dev_id = id++;
+ mutex_unlock(&dma_list_mutex);
/* represent channels in sysfs. Probably want devs too */
list_for_each_entry(chan, &device->channels, device_node) {
next prev parent reply other threads:[~2009-01-13 1:32 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20090113012006.063755472@mini.kroah.org>
2009-01-13 1:26 ` [patch 00/21] 2.6.27-stable review Greg KH
2009-01-13 1:26 ` [patch 01/21] USB: gadget: fix rndis working at high speed Greg KH
2009-01-13 1:26 ` [patch 02/21] usb-storage: update unusual_devs entry for Nokia 5310 Greg KH
2009-01-13 3:15 ` Alan Stern
2009-01-13 1:26 ` [patch 03/21] USB: storage: unusual_devs.h: Nokia 3109c addition Greg KH
2009-01-13 1:26 ` [patch 04/21] USB: Unusual devs patch for Nokia 3500c Greg KH
2009-01-13 1:26 ` [patch 05/21] powerpc: Fix corruption error in rh_alloc_fixed() Greg KH
2009-01-13 1:27 ` [patch 06/21] iwlagn: downgrade BUG_ON in interrupt Greg KH
2009-01-13 1:27 ` [patch 07/21] async_xor: dma_map destination DMA_BIDIRECTIONAL Greg KH
2009-01-13 1:27 ` Greg KH [this message]
2009-01-13 1:27 ` [patch 09/21] ioat: wait for self-test completion Greg KH
2009-01-13 1:27 ` [patch 10/21] md: Dont read past end of bitmap when reading bitmap Greg KH
2009-01-13 1:27 ` [patch 11/21] ALSA: Fix a Oops bug in omap soc driver Greg KH
2009-01-13 1:27 ` [patch 12/21] SCSI: ibmvstgt: move crq_queue_create to the end of initialization Greg KH
2009-01-13 1:27 ` [patch 13/21] SCSI: aacraid: disable Dell Percraid quirk on Adaptec 2200S and 2120S Greg KH
2009-01-13 1:27 ` [patch 14/21] cciss: fix problem that deleting multiple logical drives could cause a panic Greg KH
2009-01-13 1:27 ` [patch 15/21] ALSA: hda - Add missing terminators in patch_sigmatel.c Greg KH
2009-01-13 1:27 ` [patch 16/21] parisc: disable UP-optimized flush_tlb_mm Greg KH
2009-01-13 1:27 ` [patch 17/21] drivers/net: starfire: Fix napi ->poll() weight handling Greg KH
2009-01-13 1:27 ` [patch 18/21] AMD IOMMU: reset command buffer pointers manually Greg KH
2009-01-13 1:27 ` [patch 19/21] AMD IOMMU: allocate rlookup_table with __GFP_ZERO Greg KH
2009-01-13 1:27 ` [patch 20/21] AMD IOMMU: initialize phys_addr correctly in iommu_page_map Greg KH
2009-01-13 1:27 ` [patch 21/21] AMD IOMMU: fix wrong loop counter in free_pagetables Greg KH
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