After the switch to videobuf2, videobuffer callbacks are called unlocked, therefore they have to protect their internal data themselves.
Signed-off-by: Guennadi Liakhovetski <[email protected]> --- This one will be merged with https://patchwork.kernel.org/patch/516491/ drivers/media/video/sh_mobile_ceu_camera.c | 13 +++++++------ 1 files changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/media/video/sh_mobile_ceu_camera.c b/drivers/media/video/sh_mobile_ceu_camera.c index 5a8d942..325f50d 100644 --- a/drivers/media/video/sh_mobile_ceu_camera.c +++ b/drivers/media/video/sh_mobile_ceu_camera.c @@ -100,8 +100,7 @@ struct sh_mobile_ceu_dev { void __iomem *base; unsigned long video_limit; - /* lock used to protect videobuf */ - spinlock_t lock; + spinlock_t lock; /* Protects video buffer lists */ struct list_head capture; struct vb2_buffer *active; struct vb2_alloc_ctx *alloc_ctx; @@ -375,17 +374,18 @@ static int sh_mobile_ceu_videobuf_prepare(struct vb2_buffer *vb) return 0; } -/* Called under spinlock_irqsave(&pcdev->lock, ...) */ static void sh_mobile_ceu_videobuf_queue(struct vb2_buffer *vb) { struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq); struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); struct sh_mobile_ceu_dev *pcdev = ici->priv; struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb); + unsigned long flags; dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%p %lu\n", __func__, vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0)); + spin_lock_irqsave(&pcdev->lock, flags); list_add_tail(&buf->queue, &pcdev->capture); if (!pcdev->active) { @@ -397,6 +397,7 @@ static void sh_mobile_ceu_videobuf_queue(struct vb2_buffer *vb) pcdev->active = vb; sh_mobile_ceu_capture(pcdev); } + spin_unlock_irqrestore(&pcdev->lock, flags); } static void sh_mobile_ceu_videobuf_release(struct vb2_buffer *vb) @@ -442,10 +443,9 @@ static irqreturn_t sh_mobile_ceu_irq(int irq, void *data) { struct sh_mobile_ceu_dev *pcdev = data; struct vb2_buffer *vb; - unsigned long flags; int ret; - spin_lock_irqsave(&pcdev->lock, flags); + spin_lock(&pcdev->lock); vb = pcdev->active; if (!vb) @@ -469,7 +469,7 @@ static irqreturn_t sh_mobile_ceu_irq(int irq, void *data) vb2_buffer_done(vb, ret < 0 ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); out: - spin_unlock_irqrestore(&pcdev->lock, flags); + spin_unlock(&pcdev->lock); return IRQ_HANDLED; } @@ -669,6 +669,7 @@ static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr) ceu_write(pcdev, CAPSR, capsr); } +/* Capture is not running, no interrupts, no locking needed */ static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt) { -- 1.7.2.3 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
