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authorLars-Peter Clausen <lars@metafoo.de>2013-04-19 11:42:13 +0200
committerVinod Koul <vinod.koul@intel.com>2013-05-02 21:50:38 +0530
commitf22eb1402244885126c4263eb36b857e4182dd6f (patch)
tree7767872c251466aa91c09fb85efd957418f4bf03 /drivers/dma/of-dma.c
parentaf31826d9b1ce432e033f0e91529aa1013076482 (diff)
downloadlinux-f22eb1402244885126c4263eb36b857e4182dd6f.tar.gz
dma: of: Fix of_node reference leak
of_dma_request_slave_channel() currently does not drop the reference to the
dma_spec of_node if no DMA controller matching the of_node could be found. This
patch fixes it by always calling of_node_put().

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Jon Hunter <jon-hunter@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/of-dma.c')
-rw-r--r--drivers/dma/of-dma.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/dma/of-dma.c b/drivers/dma/of-dma.c
index 8266893fef45..2882403a39cf 100644
--- a/drivers/dma/of-dma.c
+++ b/drivers/dma/of-dma.c
@@ -221,12 +221,13 @@ struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
 
 		ofdma = of_dma_get_controller(&dma_spec);
 
-		if (!ofdma)
-			continue;
-
-		chan = ofdma->of_dma_xlate(&dma_spec, ofdma);
+		if (ofdma) {
+			chan = ofdma->of_dma_xlate(&dma_spec, ofdma);
 
-		of_dma_put_controller(ofdma);
+			of_dma_put_controller(ofdma);
+		} else {
+			chan = NULL;
+		}
 
 		of_node_put(dma_spec.np);