From: Tuan Phan <tuanphan@os.amperecomputing.com> To: unlisted-recipients:; (no To-header on input) Cc: patches@amperecomputing.com, Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>, Hanjun Guo <guohanjun@huawei.com>, Sudeep Holla <sudeep.holla@arm.com>, "Rafael J. Wysocki" <rjw@rjwysocki.net>, Len Brown <lenb@kernel.org>, Will Deacon <will@kernel.org>, Robin Murphy <robin.murphy@arm.com>, Neil Leeder <nleeder@codeaurora.org>, Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v3] ACPI/IORT: Fix PMCG node always look for a single ID mapping. Date: Wed, 13 May 2020 17:12:02 -0700 [thread overview] Message-ID: <1589415122-5899-1-git-send-email-tuanphan@os.amperecomputing.com> (raw) PMCG node can have zero ID mapping if its overflow interrupt is wire based. The code to parse PMCG node can not assume it will have a single ID mapping. Fixes: 24e516049360 ("ACPI/IORT: Add support for PMCG") Reviewed-by: Hanjun Guo <guoahanjun@huawei.com> Signed-off-by: Tuan Phan <tuanphan@os.amperecomputing.com> --- v1 -> v2: - Use pmcg node to detect wired base overflow interrupt. v2 -> v3: - Address Hanjun and Robin's comments. drivers/acpi/arm64/iort.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index ed3d2d1..12bb70e 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -414,6 +414,7 @@ static struct acpi_iort_node *iort_node_get_id(struct acpi_iort_node *node, static int iort_get_id_mapping_index(struct acpi_iort_node *node) { struct acpi_iort_smmu_v3 *smmu; + struct acpi_iort_pmcg *pmcg; switch (node->type) { case ACPI_IORT_NODE_SMMU_V3: @@ -441,6 +442,10 @@ static int iort_get_id_mapping_index(struct acpi_iort_node *node) return smmu->id_mapping_index; case ACPI_IORT_NODE_PMCG: + pmcg = (struct acpi_iort_pmcg *)node->node_data; + if (pmcg->overflow_gsiv || node->mapping_count == 0) + return -EINVAL; + return 0; default: return -EINVAL; -- 2.7.4
WARNING: multiple messages have this Message-ID (diff)
From: Tuan Phan <tuanphan@os.amperecomputing.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>, Robin Murphy <robin.murphy@arm.com>, Neil Leeder <nleeder@codeaurora.org>, Hanjun Guo <guohanjun@huawei.com>, "Rafael J. Wysocki" <rjw@rjwysocki.net>, linux-kernel@vger.kernel.org, Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>, linux-acpi@vger.kernel.org, Sudeep Holla <sudeep.holla@arm.com>, patches@amperecomputing.com, Will Deacon <will@kernel.org>, linux-arm-kernel@lists.infradead.org, Len Brown <lenb@kernel.org> Subject: [PATCH v3] ACPI/IORT: Fix PMCG node always look for a single ID mapping. Date: Wed, 13 May 2020 17:12:02 -0700 [thread overview] Message-ID: <1589415122-5899-1-git-send-email-tuanphan@os.amperecomputing.com> (raw) PMCG node can have zero ID mapping if its overflow interrupt is wire based. The code to parse PMCG node can not assume it will have a single ID mapping. Fixes: 24e516049360 ("ACPI/IORT: Add support for PMCG") Reviewed-by: Hanjun Guo <guoahanjun@huawei.com> Signed-off-by: Tuan Phan <tuanphan@os.amperecomputing.com> --- v1 -> v2: - Use pmcg node to detect wired base overflow interrupt. v2 -> v3: - Address Hanjun and Robin's comments. drivers/acpi/arm64/iort.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index ed3d2d1..12bb70e 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -414,6 +414,7 @@ static struct acpi_iort_node *iort_node_get_id(struct acpi_iort_node *node, static int iort_get_id_mapping_index(struct acpi_iort_node *node) { struct acpi_iort_smmu_v3 *smmu; + struct acpi_iort_pmcg *pmcg; switch (node->type) { case ACPI_IORT_NODE_SMMU_V3: @@ -441,6 +442,10 @@ static int iort_get_id_mapping_index(struct acpi_iort_node *node) return smmu->id_mapping_index; case ACPI_IORT_NODE_PMCG: + pmcg = (struct acpi_iort_pmcg *)node->node_data; + if (pmcg->overflow_gsiv || node->mapping_count == 0) + return -EINVAL; + return 0; default: return -EINVAL; -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2020-05-14 0:12 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-05-14 0:12 Tuan Phan [this message] 2020-05-14 0:12 ` [PATCH v3] ACPI/IORT: Fix PMCG node always look for a single ID mapping Tuan Phan 2020-05-14 9:29 ` Lorenzo Pieralisi 2020-05-14 9:29 ` Lorenzo Pieralisi 2020-05-14 18:06 ` Tuan Phan 2020-05-14 18:06 ` Tuan Phan
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