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ACPI: RIMT: Only defer the IOMMU configuration in init stage

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The IOMMU configuration will be deferred if the IOMMU driver
isn't probed by the time. Make this deferral only in the
initialization stage with driver_deferred_probe_check_state().
Otherwise the devices depends on IOMMU will be deferred forever
in case the IOMMU device probe failed or it doesn't appear in
the ACPI namespace.

Fixes: 8f77295525 ("ACPI: RISC-V: Add support for RIMT")
Signed-off-by: Yicong Yang <yang.yicong@picoheart.com>
Link: https://patch.msgid.link/20260625094702.11558-1-yang.yicong@picoheart.com
[pjw@kernel.org: added Fixes line]
Signed-off-by: Paul Walmsley <pjw@kernel.org>
This commit is contained in:
Yicong Yang 2026-06-25 17:47:02 +08:00 committed by Paul Walmsley
parent c8c5a7835f
commit b8f62414fa
1 changed files with 4 additions and 3 deletions
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7
drivers/acpi/riscv/rimt.c
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@ -9,6 +9,7 @@
#include <linux/acpi.h>
#include <linux/acpi_rimt.h>
#include <linux/device/driver.h>
#include <linux/iommu.h>
#include <linux/list.h>
#include <linux/pci.h>
@ -257,11 +258,11 @@ static int rimt_iommu_xlate(struct device *dev, struct acpi_rimt_node *node, u32
rimt_fwnode = rimt_get_fwnode(node);
/*
* The IOMMU drivers may not be probed yet.
* Defer the IOMMU configuration
* The IOMMU drivers may not be probed yet. Defer the IOMMU
* configuration if it's still in initialization stage.
*/
if (!rimt_fwnode)
return -EPROBE_DEFER;
return driver_deferred_probe_check_state(dev);
/*
* EPROBE_DEFER ensures IOMMU is probed before the devices that