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mfd: wcd934x: set DMA mask on parent to silence "DMA mask not set"

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The wcd934x MFD parent (a slim_device) never initializes its
dma_mask/coherent_dma_mask. When the DT-aware children pass through
of_dma_configure() this triggers the "DMA mask not set" warning for
each child.

Cc: stable@vger.kernel.org
Fixes: f959dcd6dd ("dma-direct: Fix potential NULL pointer dereference")
Assisted-by: tencent:hy3
Signed-off-by: David Heidelberg <david@ixit.cz>
Link: https://patch.msgid.link/20260903-wcd-dma-v2-1-189cff560a28@ixit.cz
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
David Heidelberg 2026-09-03 16:42:05 +02:00 committed by Lee Jones
parent fdb122928a
commit b296be1dc0
1 changed files with 6 additions and 0 deletions
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6
drivers/mfd/wcd934x.c
View File

@ -2,6 +2,7 @@
// Copyright (c) 2019, Linaro Limited
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
@ -217,6 +218,11 @@ static int wcd934x_slim_probe(struct slim_device *sdev)
struct gpio_desc *reset_gpio;
int ret;
ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
if (ret)
return dev_err_probe(dev, ret,
"Failed to set DMA mask\n");
ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);
if (!ddata)
return -ENOMEM;