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[103.229.18.19]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-82739ff350asm14132649b3a.35.2026.03.02.22.16.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Mar 2026 22:16:15 -0800 (PST) Sender: Sunil Vishwanathpura Laxminarasimha From: Sunil V L X-Google-Original-From: Sunil V L , Len Brown , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Anup Patel , Andrew Jones , Anup Patel , Sunil V L Subject: [PATCH] ACPI: RIMT: Add dependency between iommu and devices Date: Tue, 3 Mar 2026 11:46:05 +0530 Message-ID: <20260303061605.722949-1-sunilvl@oss.qualcomm.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Proofpoint-ORIG-GUID: AZS3mYAYAjf8CZOPrqzbeKwT4SqB2suy X-Authority-Analysis: v=2.4 cv=dfmNHHXe c=1 sm=1 tr=0 ts=69a67cb1 cx=c_pps a=Qgeoaf8Lrialg5Z894R3/Q==:117 a=Ou0eQOY4+eZoSc0qltEV5Q==:17 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=Um2Pa8k9VHT-vaBCBUpS:22 a=EUspDBNiAAAA:8 a=UhKKETOMA_ZNL8J_uLkA:9 a=x9snwWr2DeNwDh03kgHS:22 X-Proofpoint-GUID: AZS3mYAYAjf8CZOPrqzbeKwT4SqB2suy X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzAzMDA0MSBTYWx0ZWRfXwqEUEjNa5CHN 1LraJRr8ZgCxjqmWPJuMi10d7XkOt9ziCLWZSDw77ermShvBxIM/iFK36rWl+Ds/gETEoJOGGcl sNM/iDUIMOVqVtqYG2wuxyxbT6Ues4j32USD62dVRflkWD6Y3UXNMyZmX/IJGMlr3kL7zS7ODrq Wl16FjB4ipWgVyvHzvl8G9S8lbEDSf2k21LYW2k6XfG9WhAfhbB8QSw0BlD7drj/HTrs7r2+jTn Dm9JvwBtwgKdzJuLccxWDBV2a/u0SntHatu/JjyHc8/EyhFXVUmA1OaWE7y6uGBPFTY01P9l9Gd +nFpc+nSO/KlU6WxLnLRnzT9Df4VBFymM9+LHdJk1jfh35BGDWnIJq0jL4EYpKrXfhsjTZWhv7u syQA6SdQibcROOjLkNEPWnZ7+w9Rd+8w71I10uOALg9jr717ThdHO9KvX2FOpZV6i9qjPXZTCS3 yl9DRofyKF3h8ubvjfQ== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-02_05,2026-03-03_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 bulkscore=0 impostorscore=0 phishscore=0 clxscore=1015 spamscore=0 adultscore=0 suspectscore=0 lowpriorityscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603030041 Content-Type: text/plain; charset="utf-8" From: Sunil V L 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 --- drivers/acpi/riscv/rimt.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/acpi/riscv/rimt.c b/drivers/acpi/riscv/rimt.c index 7f423405e5ef..8eaa8731bddd 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; =20 + /* + * 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); } =20 --=20 2.43.0