[PATCH v2] usb: musb: musb_cppi41: Update an error message

[Alexandre Bailon <abailon-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>]

If dma_request_slave_channel() failed to return a channel,
then the driver will print an error and request to defer probe,
regardless of the cause of the failure.
Only defer if the DMA is not ready yet and print an error to explain
that we are deferring probe.

Signed-off-by: Alexandre Bailon <abailon-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
---
 drivers/usb/musb/musb_cppi41.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c
index e7c8b1b..4718d0d 100644
--- a/drivers/usb/musb/musb_cppi41.c
+++ b/drivers/usb/musb/musb_cppi41.c
@@ -673,10 +673,12 @@ static int cppi41_dma_controller_start(struct cppi41_dma_controller *controller)
 		musb_dma->status = MUSB_DMA_STATUS_FREE;
 		musb_dma->max_len = SZ_4M;
 
-		dc = dma_request_slave_channel(dev->parent, str);
-		if (!dc) {
-			dev_err(dev, "Failed to request %s.\n", str);
-			ret = -EPROBE_DEFER;
+		dc = dma_request_chan(dev->parent, str);
+		if (IS_ERR(dc)) {
+			ret = PTR_ERR(dc);
+			dev_err(dev, "Failed to request %s%s.\n", str,
+				ret == -EPROBE_DEFER
+				? ", deferring probe" : "");
 			goto err;
 		}
 		cppi41_channel->dc = dc;
-- 
2.10.2

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