From patchwork Thu Jan 4 02:48:18 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kai-Heng Feng X-Patchwork-Id: 759893 Received: from smtp-relay-canonical-1.canonical.com (smtp-relay-canonical-1.canonical.com [185.125.188.121]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 38BCE1FBB; Thu, 4 Jan 2024 02:48:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=canonical.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=canonical.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=canonical.com header.i=@canonical.com header.b="PHZgtxPd" Received: from HP-EliteBook-x360-830-G8-Notebook-PC.. (unknown [10.101.196.174]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-canonical-1.canonical.com (Postfix) with ESMTPSA id A8B123F722; Thu, 4 Jan 2024 02:48:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; s=20210705; t=1704336511; bh=qJZEPxVyP2sE0E3LLTPNVpWVMnWfCSJTXOSyhRDwibE=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=PHZgtxPdoqTnO98HMsw4+UrL6nE121jBQPBCtOT99H61V8UGfRussxW8hXnZvP+T+ x53XaYBR1hJAxqcSpTNlSwgqxFx1jxX1rOO5x/YvKm7vsKJIUU6Jh61E1zbMsggHOz rzNPVKwOWT+LLmZsxr2LYzBkbBlMEShFF8+uu9teXt87TvmBHS7uomjB0yyx02VVIq w2mT7ZtJGDAY9EZ9mexN9UZagH0wARM6coGHE5BkdQvaSGl59FdUsrj2XWW2JdTuy3 8bsPfci6L7smeta59ma/s1YVFaN7Wg0mmwonrxHDVT78YOcQ099SqBvFi1zDsXyeKA nCpYg7bNzQ7AQ== From: Kai-Heng Feng To: jdelvare@suse.com, linux@roeck-us.net Cc: Kai-Heng Feng , "Rafael J. Wysocki" , Len Brown , Robert Moore , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, acpica-devel@lists.linux.dev Subject: [PATCH v3 1/2] ACPI: IPMI: Add helper to wait for when SMI is selected Date: Thu, 4 Jan 2024 10:48:18 +0800 Message-Id: <20240104024819.848979-1-kai.heng.feng@canonical.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The function of acpi_power_meter module on Dell system requires IPMI handler is installed and SMI is selected. So add a helper to let acpi_power_meter know when IPMI handler and SMI are ready. Signed-off-by: Kai-Heng Feng --- v3: - New patch. drivers/acpi/acpi_ipmi.c | 17 ++++++++++++++++- include/acpi/acpi_bus.h | 5 +++++ 2 files changed, 21 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/acpi_ipmi.c b/drivers/acpi/acpi_ipmi.c index 0555f68c2dfd..54862cab7171 100644 --- a/drivers/acpi/acpi_ipmi.c +++ b/drivers/acpi/acpi_ipmi.c @@ -23,6 +23,8 @@ MODULE_LICENSE("GPL"); #define IPMI_TIMEOUT (5000) #define ACPI_IPMI_MAX_MSG_LENGTH 64 +static struct completion smi_selected; + struct acpi_ipmi_device { /* the device list attached to driver_data.ipmi_devices */ struct list_head head; @@ -463,8 +465,10 @@ static void ipmi_register_bmc(int iface, struct device *dev) if (temp->handle == handle) goto err_lock; } - if (!driver_data.selected_smi) + if (!driver_data.selected_smi) { driver_data.selected_smi = ipmi_device; + complete(&smi_selected); + } list_add_tail(&ipmi_device->head, &driver_data.ipmi_devices); mutex_unlock(&driver_data.ipmi_lock); @@ -578,10 +582,21 @@ acpi_ipmi_space_handler(u32 function, acpi_physical_address address, return status; } +int acpi_wait_for_acpi_ipmi(void) +{ + long ret; + + ret = wait_for_completion_interruptible_timeout(&smi_selected, 2 * HZ); + + return ret > 0 ? 0 : -ETIMEDOUT; +} +EXPORT_SYMBOL_GPL(acpi_wait_for_acpi_ipmi); + static int __init acpi_ipmi_init(void) { int result; acpi_status status; + init_completion(&smi_selected); if (acpi_disabled) return 0; diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index 1216d72c650f..afa6e4d4bf46 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -821,11 +821,16 @@ static inline void acpi_put_acpi_dev(struct acpi_device *adev) { acpi_dev_put(adev); } + +int acpi_wait_for_acpi_ipmi(void); + #else /* CONFIG_ACPI */ static inline int register_acpi_bus_type(void *bus) { return 0; } static inline int unregister_acpi_bus_type(void *bus) { return 0; } +static inline int acpi_wait_for_acpi_ipmi(void) { return 0; } + #endif /* CONFIG_ACPI */ #endif /*__ACPI_BUS_H__*/