From: Sunil V L Date: Tue, 3 Mar 2026 06:16:05 +0000 (+0530) Subject: ACPI: RIMT: Add dependency between iommu and devices X-Git-Tag: v7.0-rc7~1^2 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=9156585280f161fc1c3552cf1860559edb2bb7e3;p=thirdparty%2Fkernel%2Flinux.git 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 Link: https://patch.msgid.link/20260303061605.722949-1-sunilvl@oss.qualcomm.com Signed-off-by: Paul Walmsley --- 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); }