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| author | David Heidelberg <david@ixit.cz> | 2026-09-03 16:42:05 +0200 |
|---|---|---|
| committer | Lee Jones <lee@kernel.org> | 2026-09-10 17:32:07 +0100 |
| commit | 5a5f978cf3cd2f50b9e123f851f5c6577519ee89 (patch) | |
| tree | 2adf4b061137e73c7898f7b103426e082a5edbd5 /drivers/mfd | |
| parent | 3c0de351738ea03c455bc7bb0ba54de00fc024a3 (diff) | |
| download | linux-next-5a5f978cf3cd2f50b9e123f851f5c6577519ee89.tar.gz linux-next-5a5f978cf3cd2f50b9e123f851f5c6577519ee89.zip | |
mfd: wcd934x: set DMA mask on parent to silence "DMA mask not set"
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: f959dcd6ddfd ("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>
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/wcd934x.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/mfd/wcd934x.c b/drivers/mfd/wcd934x.c index 3c3080e8c8cf..7bea64fc0956 100644 --- a/drivers/mfd/wcd934x.c +++ b/drivers/mfd/wcd934x.c @@ -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; |