Subject: [PATCH v2 1/6] fsl-mc: Remove MSI domain propagation to sub-devices

From: Marc Zyngier <[email-masked]>
Date: Tue, 24 Feb 2026 10:09:31 +0000

Only the root device generates MSIs (it is the only one talking to
the ITS), so propagating the domain is pretty pointless. Remove it.

Reviewed-by: Ioana Ciornei <[email-masked]>
Tested-by: Ioana Ciornei <[email-masked]> # LX2160ARDB, LS2088ARDB
Tested-by: Sascha Bischoff <[email-masked]>
Signed-off-by: Marc Zyngier <[email-masked]>
---
 drivers/bus/fsl-mc/fsl-mc-bus.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/bus/fsl-mc/fsl-mc-bus.c b/drivers/bus/fsl-mc/fsl-mc-bus.c
index c117745cf2065..1a6c8e3c0b27f 100644
--- a/drivers/bus/fsl-mc/fsl-mc-bus.c
+++ b/drivers/bus/fsl-mc/fsl-mc-bus.c
@@ -854,14 +854,12 @@ int fsl_mc_device_add(struct fsl_mc_obj_desc *obj_desc,
 	} else {
 		/*
 		 * A non-DPRC object has to be a child of a DPRC, use the
-		 * parent's ICID and interrupt domain.
+		 * 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;
-		dev_set_msi_domain(&mc_dev->dev,
-				   dev_get_msi_domain(&parent_mc_dev->dev));
 	}
 
 	/*
-- 
2.47.3