usb: musb/ux500: 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.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Link: https://lore.kernel.org/r/20200115132547.364-19-b-liu@ti.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/musb/ux500_dma.c b/drivers/usb/musb/ux500_dma.c
index d19bb3e..d5cf5e8 100644 (file)
--- a/drivers/usb/musb/ux500_dma.c
+++ b/drivers/usb/musb/ux500_dma.c
@@ -310,9 +310,9 @@ static int ux500_dma_controller_start(struct ux500_dma_controller *controller)
                        dma_channel->max_len = SZ_16M;
 
                        ux500_channel->dma_chan =
-                               dma_request_slave_channel(dev, chan_names[ch_num]);
+                               dma_request_chan(dev, chan_names[ch_num]);
 
-                       if (!ux500_channel->dma_chan)
+                       if (IS_ERR(ux500_channel->dma_chan))
                                ux500_channel->dma_chan =
                                        dma_request_channel(mask,
                                                            data ?