kernel_5.10 no rt

hc

2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f

 kernel/drivers/dma/pl330.c
..
..
@@ -3191,6 +3191,7 @@
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 	struct resource *res;
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 	int i, ret, irq;
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 	int num_chan;
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+	int val;
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 	struct device_node *np = adev->dev.of_node;
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 	ret = dma_set_mask_and_coherent(&adev->dev, DMA_BIT_MASK(32));
..
..
@@ -3205,7 +3206,12 @@
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 	pd = &pl330->ddma;
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 	pd->dev = &adev->dev;
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-	pl330->mcbufsz = 0;
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+	if (!device_property_read_u32(&adev->dev, "arm,pl330-mcbufsz-bytes", &val)) {
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+		if ((val > 0) && (val <= PAGE_SIZE))
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+			pl330->mcbufsz = val;
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+
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+		dev_info(&adev->dev, "mcbufsz: %d bytes\n", pl330->mcbufsz);
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+	}
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3215
 
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 	/* get quirk */
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 	for (i = 0; i < ARRAY_SIZE(of_quirks); i++)