X-Git-Url: https://git.kernelconcepts.de/?a=blobdiff_plain;f=drivers%2Fdma%2Fdmaengine.c;h=09479d4be4db3d776fd1f3400724d13f26808428;hb=231e7cb816250aa7d70c9d94cdc96738a1393166;hp=3ff284c8e3d5aef72f229017c883c73cbe13403f;hpb=9f30a04d768f64280dc0c40b730746e82f298d88;p=karo-tx-linux.git

diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 3ff284c8e3d5..09479d4be4db 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -554,10 +554,18 @@ struct dma_chan *dma_get_slave_channel(struct dma_chan *chan)
 	mutex_lock(&dma_list_mutex);
 
 	if (chan->client_count == 0) {
+		struct dma_device *device = chan->device;
+
+		dma_cap_set(DMA_PRIVATE, device->cap_mask);
+		device->privatecnt++;
 		err = dma_chan_get(chan);
-		if (err)
+		if (err) {
 			pr_debug("%s: failed to get %s: (%d)\n",
 				__func__, dma_chan_name(chan), err);
+			chan = NULL;
+			if (--device->privatecnt == 0)
+				dma_cap_clear(DMA_PRIVATE, device->cap_mask);
+		}
 	} else
 		chan = NULL;