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 3F7123AE6E6 for ; Wed, 15 Jul 2026 16:32:28 +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=1784133150; cv=none; b=N5zd3cIfwGY896o0YyanTS5Fb59me7OlVHrcDaJo/0VjgsojmfS+z6lxcGLJo9q2mixg/f6TY5asxkfUY/QgMgArnlnqANis9IoaTewwBQz0hlHnLro86uBmvqH4UJeQsklk7UpbVZOnvE3x3LhinymTif9FfHWV/YYKlyUg23w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784133150; c=relaxed/simple; bh=cVLqm49OVUnlyTOiFyiMpK7BklkguM3f9/DMUEvc9MI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=ScdlNahlTKVRUXDZ3PphYKuUigYWo+sqZG6uEbjqmco6rhGNQmHLsLxzQ3Q9FCOl4BQx+Y6JH0JhVsYEhihaHGdC4FocG51GyD9DXgjO7nhShNmFQ+YEsgAmFeZQ0igCkO/sAj+jGvPTStpY/zKnKp4y6rDH9W4NGgh+QlNFS8s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=HrN/nZ7u; 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="HrN/nZ7u" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 34DA51F000E9; Wed, 15 Jul 2026 16:32:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784133148; bh=y+9Gybg0clEhzNsBRpzoK0MBhAQIDoHQkN0//Ezgc7E=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=HrN/nZ7uG/Ns9r4MVjntFUW9yuEvh9UD56Coib5beeHPuSribP5zHaPfs7uLIg0L1 Q4o441WY9O6Yvkp/4caj1EUcMlwneycxh7tyYFIiwXvan5zN+RuF7Jh9GNvoONbi6+ 3u2l0xFLLueKKJZ3pR7JhRv65f2Tnz5CkWz+5H1KqaQ5ZsBSRigoAhyzF1OuNHkVXO EUemHJmydJ/0U/Xj+2lbywzxWfcu+oV1E8cPmchwicpFhh2pJccxOmAhbC83plZ2Bt MCVRJuHSj7UtBW3kGxn17+xTqacbhVKLsaZrzkzg1+1tXXSRH552LlzWiwD1vDCaee evk/C1ajjwYNA== From: Sasha Levin To: stable@vger.kernel.org Cc: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , Bjorn Helgaas , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Sasha Levin Subject: [PATCH 5.10.y 4/6] PCI: Add kerneldoc for pci_resize_resource() Date: Wed, 15 Jul 2026 12:32:21 -0400 Message-ID: <20260715163223.952417-4-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260715163223.952417-1-sashal@kernel.org> References: <2026071318-kettle-cringe-5d1a@gregkh> <20260715163223.952417-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Ilpo Järvinen [ Upstream commit d787018e2dfdc4c1331538e7a8717690d1b7c9b3 ] As pci_resize_resource() is meant to be used also outside of PCI core, document the interface with kerneldoc. Signed-off-by: Ilpo Järvinen Signed-off-by: Bjorn Helgaas Tested-by: Alex Bennée # AVA, AMD GPU Link: https://patch.msgid.link/20251113162628.5946-8-ilpo.jarvinen@linux.intel.com Stable-dep-of: ee7471fe968d ("PCI: Skip Resizable BAR restore on read error") Signed-off-by: Sasha Levin --- drivers/pci/setup-res.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c index 9561365c95b37f..aa66e85a3a4715 100644 --- a/drivers/pci/setup-res.c +++ b/drivers/pci/setup-res.c @@ -422,6 +422,26 @@ void pci_release_resource(struct pci_dev *dev, int resno) } EXPORT_SYMBOL(pci_release_resource); +/** + * pci_resize_resource - reconfigure a Resizable BAR and resources + * @dev: the PCI device + * @resno: index of the BAR to be resized + * @size: new size as defined in the spec (0=1MB, 31=128TB) + * @exclude_bars: a mask of BARs that should not be released + * + * Reconfigure @resno to @size and re-run resource assignment algorithm + * with the new size. + * + * Prior to resize, release @dev resources that share a bridge window with + * @resno. This unpins the bridge window resource to allow changing it. + * + * The caller may prevent releasing a particular BAR by providing + * @exclude_bars mask, but this may result in the resize operation failing + * due to insufficient space. + * + * Return: 0 on success, or negative on error. In case of an error, the + * resources are restored to their original places. + */ int pci_resize_resource(struct pci_dev *dev, int resno, int size, int exclude_bars) { -- 2.53.0