From: Alexandre Bailon <abai...@baylibre.com>
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.
Defer if the DMA is not ready yet otherwise print an error.
Signed-off-by: Alexandre Bailon <abai...@baylibre.com>
Reviewed-by: Johan Hovold <jo...@kernel.org>
Signed-off-by: Bin Liu <b-...@ti.com>
---
drivers/usb/musb/musb_cppi41.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c
index e7c8b1b8bf22..ba255280a624 100644
--- a/drivers/usb/musb/musb_cppi41.c
+++ b/drivers/usb/musb/musb_cppi41.c
@@ -673,12 +673,15 @@ 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);
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "Failed to request %s: %d.\n",
+ str, ret);
goto err;
}
+
cppi41_channel->dc = dc;
}
return 0;
--
1.9.1
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