From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 F379A481649; Wed, 15 Jul 2026 15:22:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784128936; cv=none; b=LPTJ9tc5ScsqYsfI+b2hSwcVQvFj5rVueWihmhoJBY5Sfp788SlSBySyWTkglYgfKavJiK5zVj9nmkcpiuqWkfIc2Xm8+FO0z3DFQPXzqNPw7bI5ytpKaHi5dw1ghILQWja3TrLT+gBQTeQE0SIHDKyqiPoP6kXqvOnMCx5jKQY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784128936; c=relaxed/simple; bh=5kN7mG8MLPeE9D88nkEBmLkjEsCxbdAekhzV3FbzuIw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=ry5aiNcC5gMwqwBLwue+x8byzF8Nb+kW2r0sbDBnROmAECIKQmV+AOadzH8w4cp1ABRLoo1IBLbHRMHiKv0suhZf64OCqQGjdquWJyUddFA8SaiN5F4u6IaE5WxvXx1whBSe3c3R6AEiq+XN2mwQ3J+vwP9wNfe7zQdG4kvEdf4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=FKTPTZEx; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="FKTPTZEx" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5146F1F000E9; Wed, 15 Jul 2026 15:22:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784128934; bh=UTenFSNRSjR+ibmn54+yGt4eFEr8XTDncmHSXL7R4vk=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=FKTPTZExW7nGutrI28Ewtx5WJVOIEOsW2IH+fN8daEXtfvXfhN4AoC/oLENy7Ezb6 GEkISbAZ6CLe0W0KdCxiYL8etWDbVIh10dKSkONjgvvHRVMiQQpYIbsfqSDMsv5EXn K3onR5Q1JadUgzjuMaunMpems++RCibjseK4jB+Z7Cf3UC6Cldboawac9PXtkHe8n+ +5AxhodKE66f8Zv24Ec0LR0gAP2M9FIoc+X3OlKfBGir6TFpgu+87i1QrXGPf5jVHb 8hc2mkcTFlAauANRmNDy3PHiUM1AhNA1V2lj13hklUoCZkRYTPoPIg3bFeN38TlbB5 U2CyWNY3+hxKw== From: "Rafael J. Wysocki" To: Linux ACPI Cc: Linux PCI , LKML , Bjorn Helgaas , Andy Shevchenko , Hans de Goede Subject: [PATCH v1 2/4] ACPI: PCI: Introduce acpi_dev_get_pci_dev() Date: Wed, 15 Jul 2026 17:16:19 +0200 Message-ID: <1961532.tdWV9SEqCh@rafael.j.wysocki> Organization: Linux Kernel Development - Intel In-Reply-To: <5115219.31r3eYUQgx@rafael.j.wysocki> References: <5115219.31r3eYUQgx@rafael.j.wysocki> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="UTF-8" From: "Rafael J. Wysocki" Some acpi_get_pci_dev() callers already have a struct ACPI device for which they want to get the struct pci_dev pointer of the associated PCI device, so they don't need to look for one. For this reason, add acpi_dev_get_pci_dev() that will get a PCI device for a given ACPI one (if possible) and turn acpi_get_pci_dev() into a static inline helper passing the acpi_fetch_acpi_dev() return value directly to acpi_dev_get_pci_dev(). No intentional functional impact. Signed-off-by: Rafael J. Wysocki --- drivers/acpi/pci_root.c | 22 +++++++++++----------- include/acpi/acpi_drivers.h | 9 +++++++-- 2 files changed, 18 insertions(+), 13 deletions(-) --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -292,20 +292,20 @@ struct acpi_pci_root *acpi_pci_find_root EXPORT_SYMBOL_GPL(acpi_pci_find_root); /** - * acpi_get_pci_dev - convert ACPI CA handle to struct pci_dev - * @handle: the handle in question + * acpi_dev_get_pci_dev - Get a struct pci_dev for a given ACPI device + * @adev: Target ACPI device. * - * Given an ACPI CA handle, the desired PCI device is located in the - * list of PCI devices. + * Get the first PCI device associated with @adev, if present, and bump up its + * reference counter. * - * If the device is found, its reference count is increased and this - * function returns a pointer to its data structure. The caller must - * decrement the reference count by calling pci_dev_put(). - * If no device is found, %NULL is returned. + * Callers are responsible for dropping the PCI device reference obtained by + * this function. + * + * Return: The struct pci_dev pointer of a reference-counted PCI device on + * success or NULL on failure. */ -struct pci_dev *acpi_get_pci_dev(acpi_handle handle) +struct pci_dev *acpi_dev_get_pci_dev(struct acpi_device *adev) { - struct acpi_device *adev = acpi_fetch_acpi_dev(handle); struct acpi_device_physical_node *pn; if (!adev) @@ -322,7 +322,7 @@ struct pci_dev *acpi_get_pci_dev(acpi_ha return NULL; } -EXPORT_SYMBOL_GPL(acpi_get_pci_dev); +EXPORT_SYMBOL_GPL(acpi_dev_get_pci_dev); /** * acpi_pci_osc_control_set - Request control of PCI root _OSC features. --- a/include/acpi/acpi_drivers.h +++ b/include/acpi/acpi_drivers.h @@ -59,14 +59,19 @@ int acpi_pci_link_free_irq(acpi_handle h struct pci_bus; #ifdef CONFIG_PCI -struct pci_dev *acpi_get_pci_dev(acpi_handle); +struct pci_dev *acpi_dev_get_pci_dev(struct acpi_device *adev); #else -static inline struct pci_dev *acpi_get_pci_dev(acpi_handle handle) +static inline struct pci_dev *acpi_dev_get_pci_dev(struct acpi_device *adev) { return NULL; } #endif +static inline struct pci_dev *acpi_get_pci_dev(acpi_handle handle) +{ + return acpi_dev_get_pci_dev(acpi_fetch_acpi_dev(handle)); +} + /* Arch-defined function to add a bus to the system */ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root);