From mboxrd@z Thu Jan 1 00:00:00 1970 From: linux@arm.linux.org.uk (Russell King - ARM Linux) Date: Mon, 2 Sep 2013 15:52:08 +0100 Subject: [alsa-devel] [PATCH 00/14] SPDIF support In-Reply-To: <20130902144713.GR3084@sirena.org.uk> References: <20130831123458.GF6617@n2100.arm.linux.org.uk> <52220B9A.9000007@metafoo.de> <20130831191414.GG6617@n2100.arm.linux.org.uk> <20130831193431.GI6617@n2100.arm.linux.org.uk> <20130902144713.GR3084@sirena.org.uk> Message-ID: <20130902145207.GY6617@n2100.arm.linux.org.uk> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Mon, Sep 02, 2013 at 03:47:13PM +0100, Mark Brown wrote: > On Sat, Aug 31, 2013 at 08:34:31PM +0100, Russell King - ARM Linux wrote: > > And here's the oops: > > > Aug 10 22:06:17 cubox kernel: [] (snd_pcm_info+0xc8/0xd8) from [] (snd_pcm_info_user+0x34/0x9c) > > Aug 10 22:06:17 cubox kernel: [] (snd_pcm_info_user+0x34/0x9c) from [] (snd_pcm_control_ioctl+0x274/0x280) > > > This is caused because substream->ops is NULL. Why that's the case, > > I don't know, but I believe the PCM which is trying to be operated on > > is the one registered against the backend (by snd_pcm_new_internal). > > Liam did provide you with a workaround for this one along with a > suggested proper fix. Have you had any success in using this > workaround, or with implementing the proper fix for that matter? I > don't recall seeing any feedback on the results but perhaps I missed it. I am not aware of any such patch.