On Sat 17 August 2013 18:25:08 Ming Lei wrote:
> Complete() will be run with interrupt enabled, so add local_irq_save()
> before acquiring the lock without irqsave().
>
> Cc: Mauro Carvalho Chehab <mche...@redhat.com>
> Cc: linux-me...@vger.kernel.org
> Signed-off-by: Ming Lei <ming....@canonical.com>
Acked-by: Hans Verkuil <hans.verk...@cisco.com>
Regards,
Hans
> ---
> drivers/media/usb/em28xx/em28xx-audio.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/media/usb/em28xx/em28xx-audio.c
> b/drivers/media/usb/em28xx/em28xx-audio.c
> index 2fdb66e..7fd1b2a 100644
> --- a/drivers/media/usb/em28xx/em28xx-audio.c
> +++ b/drivers/media/usb/em28xx/em28xx-audio.c
> @@ -113,6 +113,7 @@ static void em28xx_audio_isocirq(struct urb *urb)
> stride = runtime->frame_bits >> 3;
>
> for (i = 0; i < urb->number_of_packets; i++) {
> + unsigned long flags;
> int length =
> urb->iso_frame_desc[i].actual_length / stride;
> cp = (unsigned char *)urb->transfer_buffer +
> @@ -134,7 +135,7 @@ static void em28xx_audio_isocirq(struct urb *urb)
> length * stride);
> }
>
> - snd_pcm_stream_lock(substream);
> + snd_pcm_stream_lock_irqsave(substream, flags);
>
> dev->adev.hwptr_done_capture += length;
> if (dev->adev.hwptr_done_capture >=
> @@ -150,7 +151,7 @@ static void em28xx_audio_isocirq(struct urb *urb)
> period_elapsed = 1;
> }
>
> - snd_pcm_stream_unlock(substream);
> + snd_pcm_stream_unlock_irqrestore(substream, flags);
> }
> if (period_elapsed)
> snd_pcm_period_elapsed(substream);
>
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