From 6778948f9de86c3cfaf36725a7c87dcff9ba247f Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 08:20:59 +0000
Subject: [PATCH] kernel_5.10 no rt
---
kernel/drivers/dma/pl330.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/kernel/drivers/dma/pl330.c b/kernel/drivers/dma/pl330.c
index 9159280..b1d6fae 100644
--- a/kernel/drivers/dma/pl330.c
+++ b/kernel/drivers/dma/pl330.c
@@ -3191,6 +3191,7 @@
struct resource *res;
int i, ret, irq;
int num_chan;
+ int val;
struct device_node *np = adev->dev.of_node;
ret = dma_set_mask_and_coherent(&adev->dev, DMA_BIT_MASK(32));
@@ -3205,7 +3206,12 @@
pd = &pl330->ddma;
pd->dev = &adev->dev;
- pl330->mcbufsz = 0;
+ if (!device_property_read_u32(&adev->dev, "arm,pl330-mcbufsz-bytes", &val)) {
+ if ((val > 0) && (val <= PAGE_SIZE))
+ pl330->mcbufsz = val;
+
+ dev_info(&adev->dev, "mcbufsz: %d bytes\n", pl330->mcbufsz);
+ }
/* get quirk */
for (i = 0; i < ARRAY_SIZE(of_quirks); i++)
--
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