dmaengine: PL08x: ensure all descriptors are freed when channel is released

Ensure all queued descriptors are freed when the channel is released,
ensuring we don't leak memory

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

drivers/dma/amba-pl08x.c

@@ -1117,6 +1117,8 @@ static int pl08x_alloc_chan_resources(struct dma_chan *chan)
 
 static void pl08x_free_chan_resources(struct dma_chan *chan)
 {
+	/* Ensure all queued descriptors are freed */
+	vchan_free_chan_resources(to_virt_chan(chan));
 }
 
 static struct dma_async_tx_descriptor *pl08x_prep_dma_interrupt(