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GET /api/1.1/patches/2220956/?format=api
{ "id": 2220956, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2220956/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/20260408131154.2661818-6-aleksandr.loktionov@intel.com/", "project": { "id": 46, "url": "http://patchwork.ozlabs.org/api/1.1/projects/46/?format=api", "name": "Intel Wired Ethernet development", "link_name": "intel-wired-lan", "list_id": "intel-wired-lan.osuosl.org", "list_email": "intel-wired-lan@osuosl.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20260408131154.2661818-6-aleksandr.loktionov@intel.com>", "date": "2026-04-08T13:11:53", "name": "[iwl-net,v2,5/6] ixgbe: fix ITR value overflow in adaptive interrupt throttling", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "c576a94ee95bd5b83d48d6a6e87e487d3ccc685b", "submitter": { "id": 75597, "url": "http://patchwork.ozlabs.org/api/1.1/people/75597/?format=api", "name": "Loktionov, Aleksandr", "email": "aleksandr.loktionov@intel.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/20260408131154.2661818-6-aleksandr.loktionov@intel.com/mbox/", "series": [ { "id": 499139, "url": "http://patchwork.ozlabs.org/api/1.1/series/499139/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/list/?series=499139", "date": "2026-04-08T13:11:48", "name": "ixgbe: six bug fixes", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/499139/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2220956/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2220956/checks/", "tags": {}, "headers": { "Return-Path": "<intel-wired-lan-bounces@osuosl.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "intel-wired-lan@lists.osuosl.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "intel-wired-lan@lists.osuosl.org" ], "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=osuosl.org header.i=@osuosl.org header.a=rsa-sha256\n header.s=default header.b=o5lwy3LQ;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=osuosl.org\n (client-ip=140.211.166.137; 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envelope-from=intel-wired-lan-bounces@osuosl.org;\n receiver=<UNKNOWN> ", "DKIM-Filter": [ "OpenDKIM Filter v2.11.0 smtp4.osuosl.org DCDD940EC4", "OpenDKIM Filter v2.11.0 smtp3.osuosl.org E0CA8608A8" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=osuosl.org;\n\ts=default; t=1775653925;\n\tbh=j+GPXuo5nok7Sl5I3M8zh0LuXNegmZ7u1Eio+6IiWeo=;\n\th=From:To:Cc:Date:In-Reply-To:References:Subject:List-Id:\n\t List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe:\n\t From;\n\tb=o5lwy3LQiueXusl2+Uf3aXLh+lmahE3bCvq/w+nHGb0JtSjTnd4GJVDA2NltrpsUR\n\t 1tEJR1JiicbOr2G0Fb0PowZ3ryIgjPVzr9RlfgJQZ84U12BAuIs6+6ZMn8x7jYC2nU\n\t 058zp14vpuiCI/MaHiB3RO0QLe88H9GM02CU6bmf8m0p/N6Mkk0uWej6QnuQ36ImrY\n\t asLXtt72fZUqWjNqFUhJwVpWzzCOugYm9lgLp9B9qgHvSc9CNhzsdSXRnjUEw/kjRk\n\t 5mo9d257kLFblUCMxuJlLWPJyjRcXUh83P7dEfMreJlBQs6+H4MtEQ7VUpvxw7yPye\n\t QayYpBs+7g5ng==", "Received-SPF": "Pass (mailfrom) identity=mailfrom; client-ip=192.198.163.7;\n helo=mgamail.intel.com; envelope-from=aleksandr.loktionov@intel.com;\n receiver=<UNKNOWN>", "DMARC-Filter": "OpenDMARC Filter v1.4.2 smtp3.osuosl.org E0CA8608A8", "X-CSE-ConnectionGUID": [ "wgty392/Riu7kGS8/UOwZw==", "Bql28W+bQUuK12k1FUl8pw==" ], "X-CSE-MsgGUID": [ "dn4oHH4rQr+0xp+3G1WCig==", "oDbuBW78SbCyMCnpNeUt9g==" ], "X-IronPort-AV": [ "E=McAfee;i=\"6800,10657,11752\"; a=\"102087238\"", "E=Sophos;i=\"6.23,167,1770624000\"; d=\"scan'208\";a=\"102087238\"", "E=Sophos;i=\"6.23,167,1770624000\"; d=\"scan'208\";a=\"228714974\"" ], "X-ExtLoop1": "1", "From": "Aleksandr Loktionov <aleksandr.loktionov@intel.com>", "To": "intel-wired-lan@lists.osuosl.org, anthony.l.nguyen@intel.com,\n aleksandr.loktionov@intel.com", "Cc": "netdev@vger.kernel.org", "Date": "Wed, 8 Apr 2026 15:11:53 +0200", "Message-ID": "<20260408131154.2661818-6-aleksandr.loktionov@intel.com>", "X-Mailer": "git-send-email 2.52.0", "In-Reply-To": "<20260408131154.2661818-1-aleksandr.loktionov@intel.com>", "References": "<20260408131154.2661818-1-aleksandr.loktionov@intel.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Mailman-Original-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple;\n d=intel.com; i=@intel.com; q=dns/txt; s=Intel;\n t=1775653924; x=1807189924;\n h=from:to:cc:subject:date:message-id:in-reply-to:\n references:mime-version:content-transfer-encoding;\n bh=yv/bdNXZH9c8rMWd2v5owZSXHg0dmXwqwGf4QRKCawI=;\n b=Y2YKczcqImJWSUPaAkL67YnZ5BlsLHT/G9Ov4dKS+wjEmUequo1MlXnI\n 1zJKjOHilsBivsA9Dy6Nqm6VFqMwcqdCi6HMeA9HZAhy+AsnRsIcUpA/W\n hv3WgI/xdWuSi65cIm22rzKBvn1YsaOuK2UExBVFAk3AhJzlFm3Vby/pb\n tc9SDJ6BOEKytPGIyg/v23KTb62UwzyeCNPOtvYGWUOV8hTofYzTB4dk/\n p8TCXMOMGbo28Cy4PJgsynrr7lMhANU0URtkmEZUWYv979ph9/PSU02qi\n fOdLWkuYIFR7xnsMrVMLept+fkxl5kcTgKp6axfaOE5+fry5A3r+/SOEr\n w==;", "X-Mailman-Original-Authentication-Results": [ "smtp3.osuosl.org;\n dmarc=pass (p=none dis=none)\n header.from=intel.com", "smtp3.osuosl.org;\n dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com\n header.a=rsa-sha256 header.s=Intel header.b=Y2YKczcq" ], "Subject": "[Intel-wired-lan] [PATCH iwl-net v2 5/6] ixgbe: fix ITR value\n overflow in adaptive interrupt throttling", "X-BeenThere": "intel-wired-lan@osuosl.org", "X-Mailman-Version": "2.1.30", "Precedence": "list", "List-Id": "Intel Wired Ethernet Linux Kernel Driver Development\n <intel-wired-lan.osuosl.org>", "List-Unsubscribe": "<https://lists.osuosl.org/mailman/options/intel-wired-lan>,\n <mailto:intel-wired-lan-request@osuosl.org?subject=unsubscribe>", "List-Archive": "<http://lists.osuosl.org/pipermail/intel-wired-lan/>", "List-Post": "<mailto:intel-wired-lan@osuosl.org>", "List-Help": "<mailto:intel-wired-lan-request@osuosl.org?subject=help>", "List-Subscribe": "<https://lists.osuosl.org/mailman/listinfo/intel-wired-lan>,\n <mailto:intel-wired-lan-request@osuosl.org?subject=subscribe>", "Errors-To": "intel-wired-lan-bounces@osuosl.org", "Sender": "\"Intel-wired-lan\" <intel-wired-lan-bounces@osuosl.org>" }, "content": "ixgbe_update_itr() packs a mode flag (IXGBE_ITR_ADAPTIVE_LATENCY,\nbit 7) and a usecs delay (bits [6:0]) into an unsigned int, then\nstores the combined value in ring_container->itr which is declared as\nu8. Values above 0xFF wrap on truncation, corrupting both the delay\nand the mode flag on the next readback.\n\nSeparate the mode bits from the usecs sub-field; clamp only the usecs\nportion to [0, IXGBE_ITR_ADAPTIVE_LATENCY - 1] (= 0x7F) using min_t()\nso overflow cannot bleed into bit 7.\n\nFixes: b4ded8327fea (\"ixgbe: Update adaptive ITR algorithm\")\nCc: stable@vger.kernel.org\nSigned-off-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>\n---\nv1 -> v2:\n - Add proper [N/M] numbering so patchwork tracks it as part of the set;\n no code change.\n\n drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 5 +++--\n 1 file changed, 3 insertions(+), 2 deletions(-)", "diff": "diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c\nindex 210c7b9..9f3ae21 100644\n--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c\n+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c\n@@ -2889,8 +2889,9 @@ static void ixgbe_update_itr(struct ixgbe_q_vector *q_vector,\n \t}\n \n clear_counts:\n-\t/* write back value */\n-\tring_container->itr = itr;\n+\tring_container->itr = (itr & IXGBE_ITR_ADAPTIVE_LATENCY) |\n+\t\tmin_t(unsigned int, itr & ~IXGBE_ITR_ADAPTIVE_LATENCY,\n+\t\t IXGBE_ITR_ADAPTIVE_LATENCY - 1);\n \n \t/* next update should occur within next jiffy */\n \tring_container->next_update = next_update + 1;\n", "prefixes": [ "iwl-net", "v2", "5/6" ] }