diff options
| author | Sunil V L <sunilvl@oss.qualcomm.com> | 2026-03-03 11:46:05 +0530 |
|---|---|---|
| committer | Paul Walmsley <pjw@kernel.org> | 2026-04-04 18:38:03 -0600 |
| commit | 9156585280f161fc1c3552cf1860559edb2bb7e3 (patch) | |
| tree | 4d0b027cc080371223a0d8dd2c241a07ce7fe5f6 | |
| parent | 511361fe7a8856e2f415010942808c237a1b8061 (diff) | |
ACPI: RIMT: Add dependency between iommu and devices
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: 8f7729552582 ("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>
| -rw-r--r-- | drivers/acpi/riscv/rimt.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/acpi/riscv/rimt.c b/drivers/acpi/riscv/rimt.c index 229c4a0d47a3..906282b0e63c 100644 --- a/drivers/acpi/riscv/rimt.c +++ b/drivers/acpi/riscv/rimt.c @@ -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); } |