From patchwork Fri Dec 13 12:31:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Parthiban Veerasooran X-Patchwork-Id: 13906951 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) (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 5C3A438DC0; Fri, 13 Dec 2024 12:32:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=68.232.154.123 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734093150; cv=none; b=H0g0aZoN86U/uhmSUQJ84v6+BfYdyLQTOBEZ70jUZxCZVd7grxKb0zPJ3RYjLSRNeGHjfupXag2BL9j4b61WncgQtfPuzT1qoCQK/v3aIL64B0w8VvWrGq1f3OCLB3yAe599MMRiA1zBHm9OTDB/4YmmhKZnaDcP9lzYEkzlQyk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734093150; c=relaxed/simple; bh=n3Kwco+VC0Wx1VAHaTK3mzvPDxUFFtXgicaqkiGL3ys=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=WsdHy1/2vUtjhA6Kuwa5zmvuRSzsR/oM8Qn6FjJjHn0aq+/KmagPpSRwL5IGK0Q6gNqhsTXd0mTt8wHcrH1jJqZ3lLyxztDN5+hFhoGcxqAvSD/rwv5hRgIcah3Q0GVFVG6cTcg9VWlrU3cxJp7xoAxaHMhzwtO6ZX4bQ05+MVQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=microchip.com; spf=pass smtp.mailfrom=microchip.com; dkim=pass (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b=HrlF9JAY; arc=none smtp.client-ip=68.232.154.123 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=microchip.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=microchip.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b="HrlF9JAY" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1734093149; x=1765629149; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=n3Kwco+VC0Wx1VAHaTK3mzvPDxUFFtXgicaqkiGL3ys=; b=HrlF9JAYxtSB3vgKICnzQbJ5TSmWfGIeDiqUoUFbBqpzfcpQsj9YiTjy ssRf3lt076i4tafWnrL/1B0Y2JkOlhirIsZMhKGyDg2ZhjvGatSyT2gMj eC0O3thB3K85iVpS2L1s+FX+09Tz/H3jgBQkhidBlsuY8WJr9jXEQ+Jzf dgsb8DSiQ7B0JbPrchYnQzNt8+sbl2MwdNJ8rkejC3re7CEwbnqFVTGha ingOnfzQMfZZay1lbP/c4MhY5jzQda+jMXdvmbNDcAjyOGyNl8Cdz0097 F5bpcjqHgBuWnF/+dJ8wf+CTqxWqoCdTuDqlhRCo5NB711lHGaPs4Mpy2 w==; X-CSE-ConnectionGUID: T4iONzRASJC/nLtS7vBTbg== X-CSE-MsgGUID: Bt6f2nQJQ4uzOVKSYyZBgA== X-IronPort-AV: E=Sophos;i="6.12,231,1728975600"; d="scan'208";a="35183034" X-Amp-Result: SKIPPED(no attachment in message) Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa4.microchip.iphmx.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 13 Dec 2024 05:32:26 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.87.72) by chn-vm-ex02.mchp-main.com (10.10.87.72) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35; Fri, 13 Dec 2024 05:32:09 -0700 Received: from che-ll-i17164.microchip.com (10.10.85.11) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.2507.35 via Frontend Transport; Fri, 13 Dec 2024 05:32:06 -0700 From: Parthiban Veerasooran To: , , , , CC: , , , , Subject: [PATCH net v4 0/2] Fixes on the OPEN Alliance TC6 10BASE-T1x MAC-PHY support generic lib Date: Fri, 13 Dec 2024 18:01:57 +0530 Message-ID: <20241213123159.439739-1-parthiban.veerasooran@microchip.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org This patch series contain the below fixes. - Infinite loop error when tx credits becomes 0. - Race condition between tx skb reference pointers. v2: - Added mutex lock to protect tx skb reference handling. v3: - Added mutex protection in assigning new tx skb to waiting_tx_skb pointer. - Explained the possible scenario for the race condition with the time diagram in the commit message. v4: - Replaced mutex with spin_lock_bh() variants as the start_xmit runs in BH/softirq context which can't take sleeping locks. Parthiban Veerasooran (2): net: ethernet: oa_tc6: fix infinite loop error when tx credits becomes 0 net: ethernet: oa_tc6: fix tx skb race condition between reference pointers drivers/net/ethernet/oa_tc6.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) base-commit: 2c27c7663390d28bc71e97500eb68e0ce2a7223f