From: axboe@fb.com (Jens Axboe)
Subject: [PATH v2] NVMe: init nvme queue before enabling irq
Date: Wed, 20 Jan 2016 10:17:10 -0700 [thread overview]
Message-ID: <569FC116.5060109@fb.com> (raw)
In-Reply-To: <20160120171223.GA28243@kroah.com>
On 01/20/2016 10:12 AM, Greg KH wrote:
> On Wed, Jan 20, 2016@05:48:35AM -0500, Wenbo Wang wrote:
>> From: Wenbo Wang <wenbo.wang at memblaze.com>
>>
>> During reset process, the nvme_dev->bar (ioremapped) may change,
>> so nvmeq->q_db shall be also updated by nvme_init_queue().
>>
>> Currently nvmeq irq is enabled before queue init, so a spurious
>> interrupt triggered nvme_process_cq may access nvmeq->q_db just
>> before it is updated, this could cause kernel panic.
>>
>> Signed-off-by: Wenbo Wang <wenbo.wang at memblaze.com>
>> Reviewed-by: Wenwei Tao <wenwei.tao at memblaze.com>
>> ---
>> drivers/nvme/host/pci.c | 14 +++++++++-----
>> 1 file changed, 9 insertions(+), 5 deletions(-)
>
> <formletter>
>
> This is not the correct way to submit patches for inclusion in the
> stable kernel tree. Please read Documentation/stable_kernel_rules.txt
> for how to do this properly.
I'll mark it stable when adding, just ignore it for now.
--
Jens Axboe
next prev parent reply other threads:[~2016-01-20 17:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-20 10:48 [PATH v2] NVMe: init nvme queue before enabling irq Wenbo Wang
2016-01-20 12:34 ` Sagi Grimberg
2016-01-20 14:57 ` Keith Busch
2016-01-20 15:13 ` Johannes Thumshirn
2016-01-20 17:12 ` Greg KH
2016-01-20 17:17 ` Jens Axboe [this message]
2016-05-11 9:25 ` Johannes Thumshirn
2016-05-11 19:16 ` Keith Busch
2016-05-12 7:12 ` Johannes Thumshirn
2016-05-12 10:55 ` Johannes Thumshirn
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