From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0DEC0C79FB6 for ; Wed, 9 Sep 2026 12:37:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=5hSPgxCn/ZUJvH2rUgbxv1Y3vIU11P7lvbOo9zrImYM=; b=L1FLy0x0HvAKFXsDyW2FYsFSrU HHSZTWRcBZ9BE1OiGp3yuFrq4R2cBN1tUgkVuPp1gzIvyiXR/SNFxOHmlRA3xgsJ10ehBDZez5N5V wu0WcX6PdeDGMz7E7Qb3pGRFOyEfXrQ4i488vj0JxCpA3Rrco035Pt9S3hl6KLTWLZuAGb7gcfeUi +EB0tMwv8Fq27NVUnIwB894/atPv3qVVKOSp+AB1v/qOZiS/58wy2JQrmxiFfQqfIP7SPTqW6DcSF I+Xm/5gaaqV8/qkafQ/7OnOb+xyxrCoa0c5E12yJ9PA1exDIEWXNvNNR4AzwoqX9mi+MpMmx3kEqA xOjp5hPQ==; 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bh=5hSPgxCn/ZUJvH2rUgbxv1Y3vIU11P7lvbOo9zrImYM=; b=OhJqggxpTs7+mr88LdRjgSy8IUEUo7w9T4+Ri9PNp0fVsUEybhEwVLl+t20/sLoIPz5BTo 5in5bGXCXtswxPMEgnYZD98V1PJJedA9VrBCIpaWQ11MjqNSDYPvKgubPLFJ+q80PWsS9U RQrr79ivkn9KhcJXrKxKTsxgGs8t1PkBv1TPt9u01akvjolH5uLGhXpYcUMLByeeR+WCsY kyQrrhyH9A8FrnejSgVMFxQbSoJ9zCkL/wxwr9ceBtxxJ0iASiuAiA/inzx0L31NwG0uBy vxpVzTZn9Mqop1Ftb3k2JpIcXHGq0kqc6iEtmb9UHsOPcRjEe/qsmNvPxeAo6w== Message-ID: Date: Wed, 9 Sep 2026 14:36:37 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net 2/6] net: stmmac: selftests: Validate EEE based on the actual LPI timer value To: Nicolai Buchwitz Cc: Andrew Lunn , davem@davemloft.net, Eric Dumazet , Jakub Kicinski , Paolo Abeni , Russell King , Heiner Kallweit , =?UTF-8?Q?Alexis_Lothor=C3=A9?= , Maxime Coquelin , Alexandre Torgue , Emil Renner Berthing , Minda Chen , Neil Armstrong , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , Jan Petrous , Ovidiu Panait , Jose.Abreu@synopsys.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, linux-arm-kernel@lists.infradead.org, linux-stm32@st-md-mailman.stormreply.com, PKneuper@dspace.de, David Laight References: <20260909074740.1247762-1-maxime.chevallier@bootlin.com> <20260909074740.1247762-3-maxime.chevallier@bootlin.com> <00bfad8f52784677c6042ccd6c3fd6ed@tipi-net.de> Content-Language: en-US From: Maxime Chevallier In-Reply-To: <00bfad8f52784677c6042ccd6c3fd6ed@tipi-net.de> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Last-TLS-Session-Version: TLSv1.3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260909_053701_916454_265090BC X-CRM114-Status: GOOD ( 13.98 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 9/9/26 13:40, Nicolai Buchwitz wrote: > On 9.9.2026 09:47, Maxime Chevallier wrote: >> The EEE selftest is a 2-step test : >>  - It validates that we enter in LPI mode with the >>    irq_tx_path_in_lpi_mode_n counter >>  - It then validates that we exit LPI when sending a frame, with the >>    irq_tx_path_exit_lpi_mode_n counter. >> >> The current state of the test lacks 2 main things : >> >>  - We don't know exactly when was the previous frame sent (it's from the >>    previous selftest) >> >>  - The timeout is hardcoded, while the LPI is entered after a >>    user-configurable delay. On top of that, the timeout loop uses a >>    pre-decrement iterator (--retries) that actually only iterate nine >>    times, so 900ms while the default LPI value is 1 second. >> >> Let's therefore make it more deterministic : >> >>  - Send a frame at the beginning of the test >>  - Wait for more than the lpi timer value, we timeout after about twice >>    the value, >>  - Then send another frame, and verify that we do go out of LPI, also >>    with a timeout. >> >> Note that the test's goal isn't to validate the LPI timer value itself, >> only that we enter/leave LPI mode. >> >> Fixes: 091810dbded9 ("net: stmmac: Introduce selftests support") >> Signed-off-by: Maxime Chevallier >> --- > >> [...] > > Forget to mention in my last comment: > The series seems to be broken. I can't find patch 3 and also the cover > letter is missing on lore and my inbox? Huh that's strange indeed, it's on lkml but not netdev@ ? https://lore.kernel.org/lkml/20260909074740.1247762-1-maxime.chevallier@bootlin.com/ meh I'll resend if need be Maxime > > Nicolai