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GET /api/patches/2207746/?format=api
{ "id": 2207746, "url": "http://patchwork.ozlabs.org/api/patches/2207746/?format=api", "web_url": "http://patchwork.ozlabs.org/project/uboot/patch/20260309210642.522626-1-jonas@kwiboo.se/", "project": { "id": 18, "url": "http://patchwork.ozlabs.org/api/projects/18/?format=api", "name": "U-Boot", "link_name": "uboot", "list_id": "u-boot.lists.denx.de", "list_email": "u-boot@lists.denx.de", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260309210642.522626-1-jonas@kwiboo.se>", "list_archive_url": null, "date": "2026-03-09T21:06:39", "name": "[v2] net: lwip: Fix PBUF_POOL_BUFSIZE when PROT_TCP_LWIP is disabled", "commit_ref": null, "pull_url": null, "state": "accepted", "archived": false, "hash": "3834cd51365324f4d5f0790025f171afd3bce7e4", "submitter": { "id": 71439, "url": "http://patchwork.ozlabs.org/api/people/71439/?format=api", "name": "Jonas Karlman", "email": "jonas@kwiboo.se" }, "delegate": { "id": 157425, "url": "http://patchwork.ozlabs.org/api/users/157425/?format=api", "username": "jforissier", "first_name": "Jerome", "last_name": "Forissier", "email": "jerome.forissier@linaro.org" }, "mbox": "http://patchwork.ozlabs.org/project/uboot/patch/20260309210642.522626-1-jonas@kwiboo.se/mbox/", "series": [ { "id": 495083, "url": "http://patchwork.ozlabs.org/api/series/495083/?format=api", "web_url": "http://patchwork.ozlabs.org/project/uboot/list/?series=495083", "date": "2026-03-09T21:06:39", "name": "[v2] net: lwip: Fix PBUF_POOL_BUFSIZE when PROT_TCP_LWIP is disabled", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/495083/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2207746/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2207746/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<u-boot-bounces@lists.denx.de>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n secure) header.d=kwiboo.se header.i=@kwiboo.se header.a=rsa-sha256\n header.s=fe-e1b5cab7be header.b=AB11wF/l;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; 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Mon, 9 Mar 2026 22:06:55 +0100 (CET)", "from smtp.forwardemail.net (smtp.forwardemail.net [121.127.44.66])\n (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits))\n (No client certificate requested)\n by phobos.denx.de (Postfix) with ESMTPS id 5953583952\n for <u-boot@lists.denx.de>; Mon, 9 Mar 2026 22:06:53 +0100 (CET)" ], "X-Spam-Checker-Version": "SpamAssassin 3.4.2 (2018-09-13) on phobos.denx.de", "X-Spam-Level": "", "X-Spam-Status": "No, score=-0.9 required=5.0 tests=BAYES_00,DKIM_SIGNED,\n DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED,\n RCVD_IN_VALIDITY_CERTIFIED_BLOCKED,RCVD_IN_VALIDITY_RPBL_BLOCKED,\n SPF_HELO_PASS,SPF_PASS autolearn=no autolearn_force=no version=3.4.2", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=kwiboo.se;\n h=Content-Transfer-Encoding: MIME-Version: Message-ID: Date: Subject: Cc:\n To: From; q=dns/txt; s=fe-e1b5cab7be; t=1773090412;\n bh=Zmmw/xyPzflgKMNgcKdK27A+nL9Es2sODWYEbrVuRVY=;\n b=AB11wF/lJXs2X/XfkYDDdLPVAXVOkt32hrETRq9xyQ0r0YSW7iIyaWnccBJtow08MA+TSIam4\n LHY/sCm/jQCtQu6oRGhj4SVxyI7ccDx0gQqjBjSJBZLdZjfETyg+05+ArILflQqYULSpJHZ9QSN\n d6dhgt284fNXVXvA1r6blwc+Rk0LN02KBw3Js+PMK3GHAGAdwgGIZN6TUETrRrssaP1sEPu+SZU\n rv+MsdN9LU6KQES3LX3E/M5YUdYLH7xvighTJ7PYRtMnoNf2uMLuSBwcLxF+HVi/rnsiqVqgzc9\n esdLiNYAnLle8u1IcYhu2mScGkRjOEzmWLtQAtHaoRiw==", "X-Forward-Email-ID": "69af3668620712b66b4f621d", "X-Forward-Email-Sender": "rfc822; jonas@kwiboo.se, smtp.forwardemail.net,\n 121.127.44.66", "X-Forward-Email-Version": "2.6.49", "X-Forward-Email-Website": "https://forwardemail.net", "X-Complaints-To": "abuse@forwardemail.net", "X-Report-Abuse": "abuse@forwardemail.net", "X-Report-Abuse-To": "abuse@forwardemail.net", "From": "Jonas Karlman <jonas@kwiboo.se>", "To": "Jerome Forissier <jerome.forissier@arm.com>,\n Tom Rini <trini@konsulko.com>,\n Ilias Apalodimas <ilias.apalodimas@linaro.org>", "Cc": "Jonas Karlman <jonas@kwiboo.se>,\n\tu-boot@lists.denx.de", "Subject": "[PATCH v2] net: lwip: Fix PBUF_POOL_BUFSIZE when PROT_TCP_LWIP is\n disabled", "Date": "Mon, 9 Mar 2026 21:06:39 +0000", "Message-ID": "<20260309210642.522626-1-jonas@kwiboo.se>", "X-Mailer": "git-send-email 2.53.0", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-BeenThere": "u-boot@lists.denx.de", "X-Mailman-Version": "2.1.39", "Precedence": "list", "List-Id": "U-Boot discussion <u-boot.lists.denx.de>", "List-Unsubscribe": "<https://lists.denx.de/options/u-boot>,\n <mailto:u-boot-request@lists.denx.de?subject=unsubscribe>", "List-Archive": "<https://lists.denx.de/pipermail/u-boot/>", "List-Post": "<mailto:u-boot@lists.denx.de>", "List-Help": "<mailto:u-boot-request@lists.denx.de?subject=help>", "List-Subscribe": "<https://lists.denx.de/listinfo/u-boot>,\n <mailto:u-boot-request@lists.denx.de?subject=subscribe>", "Errors-To": "u-boot-bounces@lists.denx.de", "Sender": "\"U-Boot\" <u-boot-bounces@lists.denx.de>", "X-Virus-Scanned": "clamav-milter 0.103.8 at phobos.denx.de", "X-Virus-Status": "Clean" }, "content": "The PBUF_POOL_BUFSIZE ends up being only 592 bytes, instead of 1514,\nwhen PROT_TCP_LWIP Kconfig option is disabled. This results in a full\nEthernet frame requiring three PBUFs instead of just one.\n\nThis happens because the PBUF_POOL_BUFSIZE constant depends on the value\nof a TCP_MSS constant, something that defaults to 536 when PROT_TCP_LWIP\nis disabled.\n\n PBUF_POOL_BUFSIZE = LWIP_MEM_ALIGN_SIZE(TCP_MSS + 40 + PBUF_LINK_HLEN)\n\nEnsure that a full Ethernet frame fits inside a single PBUF by moving\nthe define of TCP_MSS outside the PROT_TCP_LWIP ifdef block.\n\nFixes: 1c41a7afaa15 (\"net: lwip: build lwIP\")\nAcked-by: Jerome Forissier <jerome.forissier@arm.com>\nSigned-off-by: Jonas Karlman <jonas@kwiboo.se>\n---\nChanges in v2:\n- Add comment\n- Collect a-b tag\n---\n lib/lwip/u-boot/lwipopts.h | 6 +++++-\n 1 file changed, 5 insertions(+), 1 deletion(-)", "diff": "diff --git a/lib/lwip/u-boot/lwipopts.h b/lib/lwip/u-boot/lwipopts.h\nindex e8a2c9d7a0a6..1550870fa866 100644\n--- a/lib/lwip/u-boot/lwipopts.h\n+++ b/lib/lwip/u-boot/lwipopts.h\n@@ -121,9 +121,13 @@\n #define LWIP_UDP 0\n #endif\n \n+/*\n+ * PBUF_POOL_BUFSIZE is derived from TCP_MSS even when\n+ * CONFIG_PROT_TCP_LWIP is not defined\n+ */\n+#define TCP_MSS 1460\n #if defined(CONFIG_PROT_TCP_LWIP)\n #define LWIP_TCP 1\n-#define TCP_MSS 1460\n #define TCP_WND CONFIG_LWIP_TCP_WND\n #define LWIP_WND_SCALE 1\n #define TCP_RCV_SCALE 0x7\n", "prefixes": [ "v2" ] }