add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/dma/mcf-edma.c
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@@ -191,7 +191,13 @@
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 		return -EINVAL;
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 	}
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-	chans = pdata->dma_channels;
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+	if (!pdata->dma_channels) {
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+		dev_info(&pdev->dev, "setting default channel number to 64");
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+		chans = 64;
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+	} else {
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+		chans = pdata->dma_channels;
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+	}
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+
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 	len = sizeof(*mcf_edma) + sizeof(*mcf_chan) * chans;
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 	mcf_edma = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
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 	if (!mcf_edma)
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@@ -202,11 +208,6 @@
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 	/* Set up drvdata for ColdFire edma */
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 	mcf_edma->drvdata = &mcf_data;
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 	mcf_edma->big_endian = 1;
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-
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-	if (!mcf_edma->n_chans) {
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-		dev_info(&pdev->dev, "setting default channel number to 64");
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-		mcf_edma->n_chans = 64;
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-	}
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 	mutex_init(&mcf_edma->fsl_edma_mutex);
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