Commit fb185a40 authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Michael Ellerman
Browse files

powerpc/512x: Use dma_request_chan() instead dma_request_slave_channel() 



dma_request_slave_channel() is a wrapper on top of dma_request_chan()
eating up the error code.

By using dma_request_chan() directly the driver can support deferred
probing against DMA.

Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191217073730.21249-1-peter.ujfalusi@ti.com
parent 1c7f4fe8

arch/powerpc/platforms/512x/mpc512x_lpbfifo.c

+3 −3
Original line number Diff line number Diff line
@@ -434,9 +434,9 @@ static int mpc512x_lpbfifo_probe(struct platform_device *pdev) 
	memset(&lpbfifo, 0, sizeof(struct lpbfifo_data));

	spin_lock_init(&lpbfifo.lock);



	lpbfifo.chan = dma_request_slave_channel(&pdev->dev, "rx-tx");

	if (lpbfifo.chan == NULL)

		return -EPROBE_DEFER;

	lpbfifo.chan = dma_request_chan(&pdev->dev, "rx-tx");

	if (IS_ERR(lpbfifo.chan))

		return PTR_ERR(lpbfifo.chan);



	if (of_address_to_resource(pdev->dev.of_node, 0, &r) != 0) {

		dev_err(&pdev->dev, "bad 'reg' in 'sclpc' device tree node\n");