1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 571041477ab..0c434dca4bf 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -116,6 +116,9 @@ struct dma_pl330_desc {
         struct dma_pl330_chan *pchan;
 };
 
+/* forward declaration */
+static struct amba_driver pl330_driver;
+
 static inline struct dma_pl330_chan *
 to_pchan(struct dma_chan *ch)
 {
@@ -267,6 +270,18 @@ static void dma_pl330_rqcb(void *token, enum pl330_op_err err)
         tasklet_schedule(&pch->task);
 }
 
+bool pl330_filter(struct dma_chan *chan, void *param)
+{
+        struct dma_pl330_peri *peri;
+
+        if (chan->device->dev->driver != &pl330_driver.drv)
+                return false;
+
+        peri = chan->private;
+        return peri->peri_id == (unsigned)param;
+}
+EXPORT_SYMBOL(pl330_filter);
+
 static int pl330_alloc_chan_resources(struct dma_chan *chan)
 {
         struct dma_pl330_chan *pch = to_pchan(chan);