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[37.49.67.221]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-5e816ad38f3sm4335232a12.63.2025.03.16.01.33.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 16 Mar 2025 01:33:24 -0700 (PDT) From: Patrick Rudolph To: Simon Glass , Tom Rini Cc: Patrick Rudolph , u-boot@lists.denx.de Subject: [PATCH 4/5] acpi: Conditionally set mapping_offset in IORT Date: Sun, 16 Mar 2025 09:32:55 +0100 Message-ID: <20250316083300.2692377-4-patrick.rudolph@9elements.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250316083300.2692377-1-patrick.rudolph@9elements.com> References: <20250316083300.2692377-1-patrick.rudolph@9elements.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.39 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.8 at phobos.denx.de X-Virus-Status: Clean The spec recommends to set the mapping_offset only when there are ID mappings as indicated by the mapping_count field. Signed-off-by: Patrick Rudolph --- lib/acpi/acpi_table.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/lib/acpi/acpi_table.c b/lib/acpi/acpi_table.c index fc43862ec37..4ad1f56e961 100644 --- a/lib/acpi/acpi_table.c +++ b/lib/acpi/acpi_table.c @@ -649,7 +649,9 @@ int acpi_iort_add_rc(struct acpi_ctx *ctx, node->type = ACPI_IORT_NODE_PCI_ROOT_COMPLEX; node->revision = 2; node->mapping_count = num_mappings; - node->mapping_offset = sizeof(struct acpi_iort_node) + sizeof(struct acpi_iort_rc); + if (num_mappings) + node->mapping_offset = sizeof(struct acpi_iort_node) + + sizeof(struct acpi_iort_rc); node->length = sizeof(struct acpi_iort_node); node->length += sizeof(struct acpi_iort_rc); @@ -709,7 +711,9 @@ int acpi_iort_add_smmu_v3(struct acpi_ctx *ctx, node->type = ACPI_IORT_NODE_SMMU_V3; node->revision = 5; node->mapping_count = num_mappings; - node->mapping_offset = sizeof(struct acpi_iort_node) + sizeof(struct acpi_iort_smmu_v3); + if (num_mappings) + node->mapping_offset = sizeof(struct acpi_iort_node) + + sizeof(struct acpi_iort_smmu_v3); node->length = sizeof(struct acpi_iort_node); node->length += sizeof(struct acpi_iort_smmu_v3); -- 2.48.1