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GET /api/patches/2217875/?format=api
{ "id": 2217875, "url": "http://patchwork.ozlabs.org/api/patches/2217875/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ide/patch/20260330203737.3995-1-rosenp@gmail.com/", "project": { "id": 13, "url": "http://patchwork.ozlabs.org/api/projects/13/?format=api", "name": "Linux IDE development", "link_name": "linux-ide", "list_id": "linux-ide.vger.kernel.org", "list_email": "linux-ide@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260330203737.3995-1-rosenp@gmail.com>", "list_archive_url": null, "date": "2026-03-30T20:37:37", "name": "[PATCHv3] ata: libahci_platform: use flex array for platform PHYs", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "a5477b0ac64f2a987d706f862b5d676d01e5edd9", "submitter": { "id": 70304, "url": "http://patchwork.ozlabs.org/api/people/70304/?format=api", "name": "Rosen Penev", "email": "rosenp@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-ide/patch/20260330203737.3995-1-rosenp@gmail.com/mbox/", "series": [ { "id": 498090, "url": "http://patchwork.ozlabs.org/api/series/498090/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ide/list/?series=498090", "date": "2026-03-30T20:37:37", "name": "[PATCHv3] ata: libahci_platform: use flex array for platform PHYs", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/498090/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2217875/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2217875/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-ide+bounces-5399-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-ide@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=ROSKQEPE;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c04:e001:36c::12fc:5321; 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R. Silva\" <gustavoars@kernel.org>,\n\tlinux-kernel@vger.kernel.org (open list),\n\tlinux-hardening@vger.kernel.org (open list:KERNEL HARDENING (not covered by\n other areas):Keyword:\\b__counted_by(_le|_be)?\\b)", "Subject": "[PATCHv3] ata: libahci_platform: use flex array for platform PHYs", "Date": "Mon, 30 Mar 2026 13:37:37 -0700", "Message-ID": "<20260330203737.3995-1-rosenp@gmail.com>", "X-Mailer": "git-send-email 2.53.0", "Precedence": "bulk", "X-Mailing-List": "linux-ide@vger.kernel.org", "List-Id": "<linux-ide.vger.kernel.org>", "List-Subscribe": "<mailto:linux-ide+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-ide+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit" }, "content": "Modify struct ahci_host_priv to use a flexible array member for an adapter port\nPHYs and use struct_size to combine the allocation of this array together with\nthe adapter private data structure. __counted_by() annotation is added for the\nphys field to support runtime analysis.\n\nSigned-off-by: Rosen Penev <rosenp@gmail.com>\nReviewed-by: Damien Le Moal <dlemoal@kernel.org>\n---\n v3: update description\n v2: update commit title\n drivers/ata/ahci.h | 3 ++-\n drivers/ata/libahci_platform.c | 33 +++++++++++++++------------------\n 2 files changed, 17 insertions(+), 19 deletions(-)\n\n--\n2.53.0", "diff": "diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h\nindex 293b7fb216b5..9e8b6319025c 100644\n--- a/drivers/ata/ahci.h\n+++ b/drivers/ata/ahci.h\n@@ -357,7 +357,6 @@ struct ahci_host_priv {\n \t * If platform uses PHYs. There is a 1:1 relation between the port number and\n \t * the PHY position in this array.\n \t */\n-\tstruct phy\t\t**phys;\n \tunsigned\t\tnports;\t\t/* Number of ports */\n \tvoid\t\t\t*plat_data;\t/* Other platform data */\n \tunsigned int\t\tirq;\t\t/* interrupt line */\n@@ -379,6 +378,8 @@ struct ahci_host_priv {\n \t/* only required for per-port MSI(-X) support */\n \tint\t\t\t(*get_irq_vector)(struct ata_host *host,\n \t\t\t\t\t\t int port);\n+\n+\tstruct phy\t\t*phys[] __counted_by(nports);\n };\n\n /*\ndiff --git a/drivers/ata/libahci_platform.c b/drivers/ata/libahci_platform.c\nindex f37247e7a5cb..6e072d681341 100644\n--- a/drivers/ata/libahci_platform.c\n+++ b/drivers/ata/libahci_platform.c\n@@ -482,15 +482,29 @@ struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev,\n \tstruct ahci_host_priv *hpriv;\n \tu32 mask_port_map = 0;\n \tu32 max_port;\n+\tint nports;\n\n \tif (!devres_open_group(dev, NULL, GFP_KERNEL))\n \t\treturn ERR_PTR(-ENOMEM);\n\n-\thpriv = devres_alloc(ahci_platform_put_resources, sizeof(*hpriv),\n+\t/* find maximum port id for allocating structures */\n+\tmax_port = ahci_platform_find_max_port_id(dev);\n+\t/*\n+\t * Set nports according to maximum port id. Clamp at\n+\t * AHCI_MAX_PORTS, warning message for invalid port id\n+\t * is generated later.\n+\t * When DT has no sub-nodes max_port is 0, nports is 1,\n+\t * in order to be able to use the\n+\t * ahci_platform_[en|dis]able_[phys|regulators] functions.\n+\t */\n+\tnports = min(AHCI_MAX_PORTS, max_port + 1);\n+\thpriv = devres_alloc(ahci_platform_put_resources, struct_size(hpriv, phys, nports),\n \t\t\t GFP_KERNEL);\n \tif (!hpriv)\n \t\tgoto err_out;\n\n+\thpriv->nports = nports;\n+\n \tdevres_add(dev, hpriv);\n\n \t/*\n@@ -573,23 +587,6 @@ struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev,\n \t\tgoto err_out;\n \t}\n\n-\t/* find maximum port id for allocating structures */\n-\tmax_port = ahci_platform_find_max_port_id(dev);\n-\t/*\n-\t * Set nports according to maximum port id. Clamp at\n-\t * AHCI_MAX_PORTS, warning message for invalid port id\n-\t * is generated later.\n-\t * When DT has no sub-nodes max_port is 0, nports is 1,\n-\t * in order to be able to use the\n-\t * ahci_platform_[en|dis]able_[phys|regulators] functions.\n-\t */\n-\thpriv->nports = min(AHCI_MAX_PORTS, max_port + 1);\n-\n-\thpriv->phys = devm_kcalloc(dev, hpriv->nports, sizeof(*hpriv->phys), GFP_KERNEL);\n-\tif (!hpriv->phys) {\n-\t\trc = -ENOMEM;\n-\t\tgoto err_out;\n-\t}\n \t/*\n \t * We cannot use devm_ here, since ahci_platform_put_resources() uses\n \t * target_pwrs after devm_ have freed memory\n", "prefixes": [ "PATCHv3" ] }