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Sat, 24 Oct 2026 19:37:06 +0000 (UTC) X-Farcaster-Flow-ID: 0659cbb4-d2aa-4aff-9f15-f722995b7d39 Received: from EX19D001UWA001.ant.amazon.com (10.13.138.214) by EX19MTAUWA002.ant.amazon.com (10.250.64.202) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.2562.49; Sat, 24 Oct 2026 19:37:06 +0000 Received: from dev-dsk-farbere-1a-46ecabed.eu-west-1.amazon.com (172.19.116.181) by EX19D001UWA001.ant.amazon.com (10.13.138.214) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.2562.53; Sat, 24 Oct 2026 19:37:05 +0000 From: Eliav Farber To: Thomas Gleixner , Antoine Tenart CC: Radu Rendec , , , Eliav Farber Subject: [PATCH v2 5/5] irqchip/alpine-msi: Add debug logging for MSI allocation Date: Sat, 24 Oct 2026 19:36:20 +0000 Message-ID: <20261024193620.39999-6-farbere@amazon.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20261024193620.39999-1-farbere@amazon.com> References: <20261024193620.39999-1-farbere@amazon.com> X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: EX19D031UWC003.ant.amazon.com (10.13.139.252) To EX19D001UWA001.ant.amazon.com (10.13.138.214) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261024_123712_401120_48AF7A81 X-CRM114-Status: GOOD ( 12.02 ) X-Spam-Score: -11.9 (-----------) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-19.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 Add log messages to help follow the driver flow when debugging: an info message on successful initialisation, and debug messages on the MSI interrupt allocation and free paths. Signed-off-by: Eliav Farber --- v2: - Use %u for unsigned values (Radu). - Write MSI/SPI in upper case, to match patch 4. drivers/irqchip/irq-alpine-msi.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/irqchip/irq-alpine-msi.c b/drivers/irqchip/irq-alpine-msi.c index fb84b6046193..c13646c763d3 100644 --- a/drivers/irqchip/irq-alpine-msi.c +++ b/drivers/irqchip/irq-alpine-msi.c @@ -104,6 +104,8 @@ static int alpine_msix_middle_domain_alloc(struct irq_domain *domain, unsigned i struct alpine_msix_data *priv = domain->host_data; int sgi, err, i; + pr_debug("trying to allocate %u MSIs starting from %u\n", nr_irqs, virq); + sgi = alpine_msix_allocate_sgi(priv, nr_irqs); if (sgi < 0) return sgi; @@ -116,6 +118,9 @@ static int alpine_msix_middle_domain_alloc(struct irq_domain *domain, unsigned i irq_domain_set_hwirq_and_chip(domain, virq + i, sgi + i, &middle_irq_chip, priv); } + + pr_debug("allocated %u MSIs starting from %u\n", nr_irqs, virq); + return 0; err_sgi: @@ -132,6 +137,8 @@ static void alpine_msix_middle_domain_free(struct irq_domain *domain, unsigned i irq_domain_free_irqs_parent(domain, virq, nr_irqs); alpine_msix_free_sgi(priv, d->hwirq, nr_irqs); + + pr_debug("freed %u MSIs starting from %u\n", nr_irqs, virq); } static const struct irq_domain_ops alpine_msix_middle_domain_ops = { @@ -235,6 +242,9 @@ static int alpine_msix_init(struct device_node *node, struct device_node *parent if (ret) return ret; + pr_info("initialized successfully, SPI %u to %u\n", + priv->spi_first, priv->spi_first + priv->num_spis - 1); + retain_and_null_ptr(priv); retain_and_null_ptr(msi_map); return 0; -- 2.47.3