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From: "ira.weiny" <ira.weiny@intel.com>
To: Alexey Khoroshilov <khoroshilov@ispras.ru>
Cc: Mike Marciniszyn <infinipath@intel.com>,
	Doug Ledford <dledford@redhat.com>,
	Sean Hefty <sean.hefty@intel.com>,
	Hal Rosenstock <hal.rosenstock@gmail.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	linux-rdma@vger.kernel.org, devel@driverdev.osuosl.org,
	linux-kernel@vger.kernel.org, ldv-project@linuxtesting.org
Subject: Re: [BUG] IB/hfi1: might sleep under spinlock in hfi1_ioctl()
Date: Fri, 30 Oct 2015 19:58:18 -0400	[thread overview]
Message-ID: <20151030235817.GA13800@phlsvsds.ph.intel.com> (raw)
In-Reply-To: <1446240749-5003-1-git-send-email-khoroshilov@ispras.ru>

On Sat, Oct 31, 2015 at 12:32:29AM +0300, Alexey Khoroshilov wrote:
> Hello,
> 
> hfi1_ioctl() contains many calls to might sleep functions with
> dd->hfi1_snoop.snoop_lock spinlock held (for example, access_ok,
> copy_from_user, kzalloc(GFP_KERNEL), etc.).
> 
> Should dd->hfi1_snoop.snoop_lock be acquired just before updating state?

I believe you are correct.

I am currently in the process of pushing fixes to the staging tree.

We have a patch which fixes this queued up but it depends on at least one other
patch in my queue.

I will do my best to get this submitted soon.

Thanks,
Ira


  reply	other threads:[~2015-10-30 23:58 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-10-30 21:32 Alexey Khoroshilov
2015-10-30 23:58 ` ira.weiny [this message]
2015-11-11  5:53   ` ira.weiny

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