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 2B7D92C9D for ; Wed, 15 Jul 2026 00:18:00 +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=1784074682; cv=none; b=g/GTo3BDL4lmPwsjO6wZdr6kx3kmAvcQlRnvObpOD7RmnsWpgpkQx6dGM8A7caYxVJ1e7Yr75c5HG+4v3puz7wfn/a6IPU/D0lOd2HFGnLn9roLk84uunfyxyXhEBqDzUa0h+MHAMVe7oi7DVWjDpQgA+x1XeV06dpTcfXPjd2Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784074682; c=relaxed/simple; bh=qBWp+d31sDbpQRFFUmUORFrYymMGLY+3vymxpjUw2Ek=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=O5R8j/t4bt6AhllNWoGsKuEdiox5qSxwof7TwhUxTe6YFaGoWc7iy5V28niy3nu4o9pcXhFA5n7T01nvn6OIRidWWO7BcXr2R5FcP1pMOXrE3U0xgrupzYwo60f6V3J2NSzTuOl3jvzuX2QMmNLabMcGY1QATkHPN+qYlmLb1Kc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jycrWBMJ; 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="jycrWBMJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4C99A1F00A3A; Wed, 15 Jul 2026 00:18:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784074680; bh=QcFoAwNnOqAH9eJwsewOcSUrVDByx5uiWVDrrJFTE1I=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=jycrWBMJNWu5CRU5vaPeWGQDMvDbx8+yuPCibbK8YSmPYuRqwhesMC12g160lqajw eHaFz5CApAkpnazpdEV7tNV4RMSeI8J/cAfJ9VhxUtTZv409jw8aYIg5BQ4cvSoqXt x7wn/czOyyA07gxZ6YZfhLpZouWJlT9+46F0EtvteGZi8ybqGuMN++TawtBLxKnR5b 1qronMjo5I/hdxI7fPrX/DjHo0XIhRFWvb2LCFiO71UAT24HvxM7ZeWI38mzoaZ7P5 EcLPnxMSkfUsLVNUKF/Xed5eX9dBEWS2atioixSfDerUmSAW18peZc0Rgk8QnVMReu FhOC79C9rwUcg== 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 6.6.y 4/6] PCI: Add kerneldoc for pci_resize_resource() Date: Tue, 14 Jul 2026 20:17:54 -0400 Message-ID: <20260715001756.3783927-4-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260715001756.3783927-1-sashal@kernel.org> References: <2026071305-gulp-reenter-fa22@gregkh> <20260715001756.3783927-1-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 98d909fa83d4ac..fe627ce40e3ca4 100644 --- a/drivers/pci/setup-res.c +++ b/drivers/pci/setup-res.c @@ -427,6 +427,26 @@ 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