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ACPI: RIMT: Add dependency between iommu and devices

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EPROBE_DEFER ensures IOMMU devices are probed before the devices that
depend on them. During shutdown, however, the IOMMU may be removed
first, leading to issues. To avoid this, a device link is added
which enforces the correct removal order.

Fixes: 8f77295525 ("ACPI: RISC-V: Add support for RIMT")
Signed-off-by: Sunil V L <sunilvl@oss.qualcomm.com>
Link: https://patch.msgid.link/20260303061605.722949-1-sunilvl@oss.qualcomm.com
Signed-off-by: Paul Walmsley <pjw@kernel.org>
This commit is contained in:
Sunil V L
2026-03-03 11:46:05 +05:30
committed by Paul Walmsley
parent 511361fe7a
commit 9156585280
1 changed files with 7 additions and 0 deletions
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7
drivers/acpi/riscv/rimt.c
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@@ -263,6 +263,13 @@ static int rimt_iommu_xlate(struct device *dev, struct acpi_rimt_node *node, u32
if (!rimt_fwnode)
return -EPROBE_DEFER;
/*
* EPROBE_DEFER ensures IOMMU is probed before the devices that
* depend on them. During shutdown, however, the IOMMU may be removed
* first, leading to issues. To avoid this, a device link is added
* which enforces the correct removal order.
*/
device_link_add(dev, rimt_fwnode->dev, DL_FLAG_AUTOREMOVE_CONSUMER);
return acpi_iommu_fwspec_init(dev, deviceid, rimt_fwnode);
}