V4L/DVB (7501): soc-camera: use a spinlock for videobuffer queue

All drivers should provide a spinlock to be used in videobuf operations.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de>
Reviewed-by: Brandon Philips <bphilips@suse.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/media/video/pxa_camera.c b/drivers/media/video/pxa_camera.c
index 9758f7eb5932..bef3c9c7902a 100644
--- a/drivers/media/video/pxa_camera.c
+++ b/drivers/media/video/pxa_camera.c
@@ -803,6 +803,15 @@ static int pxa_camera_querycap(struct soc_camera_host *ici,
         return 0;
 }
 
+static spinlock_t *pxa_camera_spinlock_alloc(struct soc_camera_file *icf)
+{
+        struct soc_camera_host *ici =
+                to_soc_camera_host(icf->icd->dev.parent);
+        struct pxa_camera_dev *pcdev = ici->priv;
+
+        return &pcdev->lock;
+}
+
 static struct soc_camera_host_ops pxa_soc_camera_host_ops = {
         .owner          = THIS_MODULE,
         .add            = pxa_camera_add_device,
@@ -814,6 +823,7 @@ static struct soc_camera_host_ops pxa_soc_camera_host_ops = {
         .querycap       = pxa_camera_querycap,
         .try_bus_param  = pxa_camera_try_bus_param,
         .set_bus_param  = pxa_camera_set_bus_param,
+        .spinlock_alloc = pxa_camera_spinlock_alloc,
 };
 
 /* Should be allocated dynamically too, but we have only one. */