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| author | Vincent Jardin <vjardin@free.fr> | 2026-07-31 22:13:49 +0200 |
|---|---|---|
| committer | Christophe Leroy (CS GROUP) <chleroy@kernel.org> | 2026-09-07 20:44:40 +0200 |
| commit | f85e5ec18eb104574433caec67f452dd6e02d5de (patch) | |
| tree | 41290f86d8c422aeb894e8d5b597da8375f69ccb | |
| parent | bada60f2d98c7cf252b1f8214e5b6ec96c429588 (diff) | |
| download | linux-next-f85e5ec18eb104574433caec67f452dd6e02d5de.tar.gz linux-next-f85e5ec18eb104574433caec67f452dd6e02d5de.zip | |
bus: fsl-mc: set dma_mask for the DPRC devices
On Layerscape platforms when SMMU is disabled by ATF, the root DPRC probes
with its dma_mask pointer unset which leads to a notification:
"DMA mask not set"
so the device is left with a zero DMA mask instead of a sane default.
Let's seed the masks for all cases.
It was tested on LX2160A with no SMMU on the MC domain: the warning is gone
and the DPAA2 children probe unchanged.
Signed-off-by: Vincent Jardin <vjardin@free.fr>
Reviewed-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Link: https://lore.kernel.org/r/20260731-for-upstream-fsl-mc-dprc-dma-mask-v2-1-ea7058b90f06@free.fr
Signed-off-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org>
| -rw-r--r-- | drivers/bus/fsl-mc/fsl-mc-bus.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/bus/fsl-mc/fsl-mc-bus.c b/drivers/bus/fsl-mc/fsl-mc-bus.c index 66a4fa73c5b8..0766ccb68629 100644 --- a/drivers/bus/fsl-mc/fsl-mc-bus.c +++ b/drivers/bus/fsl-mc/fsl-mc-bus.c @@ -797,6 +797,10 @@ int fsl_mc_device_add(struct fsl_mc_obj_desc *obj_desc, } dev_set_name(&mc_dev->dev, "%s.%d", obj_desc->type, obj_desc->id); + mc_dev->dma_mask = FSL_MC_DEFAULT_DMA_MASK; + mc_dev->dev.dma_mask = &mc_dev->dma_mask; + mc_dev->dev.coherent_dma_mask = mc_dev->dma_mask; + if (strcmp(obj_desc->type, "dprc") == 0) { struct fsl_mc_io *mc_io2; @@ -838,9 +842,6 @@ int fsl_mc_device_add(struct fsl_mc_obj_desc *obj_desc, * parent's ICID. */ mc_dev->icid = parent_mc_dev->icid; - mc_dev->dma_mask = FSL_MC_DEFAULT_DMA_MASK; - mc_dev->dev.dma_mask = &mc_dev->dma_mask; - mc_dev->dev.coherent_dma_mask = mc_dev->dma_mask; } /* |