Hi Yong, On Wed, Feb 07, 2018 at 02:47:50PM -0800, Yong Zhi wrote: > This is to avoid pending interrupts to be handled during > stream off, in which case, the ready buffer will be removed > from buffer list, thus not all buffers can be returned to VB2 > as expected. Disable CIO2 irq at cio2_hw_exit() so no new > interrupts are generated. > > Signed-off-by: Yong Zhi <yong.zhi@xxxxxxxxx> > Signed-off-by: Tianshu Qiu <tian.shu.qiu@xxxxxxxxx> > --- > drivers/media/pci/intel/ipu3/ipu3-cio2.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/media/pci/intel/ipu3/ipu3-cio2.c b/drivers/media/pci/intel/ipu3/ipu3-cio2.c > index 725973f..8d75146 100644 > --- a/drivers/media/pci/intel/ipu3/ipu3-cio2.c > +++ b/drivers/media/pci/intel/ipu3/ipu3-cio2.c > @@ -518,6 +518,8 @@ static void cio2_hw_exit(struct cio2_device *cio2, struct cio2_queue *q) > unsigned int i, maxloops = 1000; > > /* Disable CSI receiver and MIPI backend devices */ > + writel(0, q->csi_rx_base + CIO2_REG_IRQCTRL_MASK); > + writel(0, q->csi_rx_base + CIO2_REG_IRQCTRL_ENABLE); > writel(0, q->csi_rx_base + CIO2_REG_CSIRX_ENABLE); > writel(0, q->csi_rx_base + CIO2_REG_MIPIBE_ENABLE); > > @@ -1027,6 +1029,7 @@ static void cio2_vb2_stop_streaming(struct vb2_queue *vq) > "failed to stop sensor streaming\n"); > > cio2_hw_exit(cio2, q); > + synchronize_irq(cio2->pci_dev->irq); Shouldn't this be put in cio2_hw_exit(), which is called from multiple locations? Presumably the same issue exists there, too. > cio2_vb2_return_all_buffers(q, VB2_BUF_STATE_ERROR); > media_pipeline_stop(&q->vdev.entity); > pm_runtime_put(&cio2->pci_dev->dev); -- Regards, Sakari Ailus e-mail: sakari.ailus@xxxxxx
