From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sendmail.purelymail.com (sendmail.purelymail.com [34.202.193.197]) (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 19A9F1A23B9 for ; Wed, 5 Nov 2025 07:07:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=34.202.193.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762326441; cv=none; b=hWZNB0yu3jwYxWlVQqVyCixfP14ZCOauRAdeSaBxpmbPfEBnCkGBf6FkBA+0sj1kK+6EkbXSRBq0rannbLqNpzKEzlwZZ3NzaHHUyJdjPIzwVZL7lmwlQyKheWNVCECGtUm7PnusxLG4DZtdDs1bK5/xkfSln7T6aZrfa42eAeQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762326441; c=relaxed/simple; bh=/Tg1Lccqz4fVCRhIRHtfJ4sNOLBsD7xjWKExD1zeR7o=; h=From:To:Cc:Subject:References:Date:In-Reply-To:Message-ID: MIME-Version:Content-Type; b=iudwAW/pQ2BcmAWraOoO5jWoMTk2+Ok8SPpDMTGHF4BMreTtpxE6D2ndOX+5HIWVC/6q8BZUbeiGg5hoM8CNZzZhQE4RUn2HhLLvK6rE4crYYMa+9GM2q4JdH4P8u7Xj2iEm1kU2z8UaiQm65Rdgc9G4XJRPeGim94idbB46ib8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=korsgaard.com; spf=pass smtp.mailfrom=korsgaard.com; dkim=pass (2048-bit key) header.d=purelymail.com header.i=@purelymail.com header.b=quRoKRsw; arc=none smtp.client-ip=34.202.193.197 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=korsgaard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=korsgaard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=purelymail.com header.i=@purelymail.com header.b="quRoKRsw" DKIM-Signature: a=rsa-sha256; b=quRoKRswxw7lS4b0m2z3P2dhDsiUtbIAOLunVjacLry+kSIG30+kGsJ9piWbnxPd5mxEWll46w2fb9+P7NL7Q+HJzRGVtTju5UxA7xNce4ot8LBiuqpns54FkEa1Io0FK/0LACtFlKL93PVnYe6Bqoc5U0KXO+Qh7BKns2J5ydZ6Ee1u5KpbUQ8sZ5jFARXdmAgWw+lg6AjsPWmIaXHCeMn2Vfm775OBkDFM5oACT4C9ge+npS4uk0mdhJpU4CYBxhxy+zTCEy5YM44aPQw0ZWQHEE4IOJ7r9nxOUQs7Y8fEx//6grqnte8qy3n9wE8OkQIHWav+kw8f2L+TELuUkQ==; s=purelymail2; d=purelymail.com; v=1; bh=/Tg1Lccqz4fVCRhIRHtfJ4sNOLBsD7xjWKExD1zeR7o=; h=Feedback-ID:Received:Received:From:To:Subject:Date; Feedback-ID: 21632:4007:null:purelymail X-Pm-Original-To: linux-mmc@vger.kernel.org Received: by smtp.purelymail.com (Purelymail SMTP) with ESMTPSA id 999999398; (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384); Wed, 05 Nov 2025 07:07:12 +0000 (UTC) Received: from peko by dell.be.48ers.dk with local (Exim 4.96) (envelope-from ) id 1vGXbr-004f7J-0Z; Wed, 05 Nov 2025 08:07:11 +0100 From: Peter Korsgaard To: Shawn Lin Cc: linux-mmc@vger.kernel.org, Avri Altman , Ulf Hansson Subject: Re: [PATCH 1/2] mmc-utils: lsmmc.c: print_mmc_cid(): correct year/month parsing References: <20251104200008.940057-1-peter@korsgaard.com> Date: Wed, 05 Nov 2025 08:07:11 +0100 In-Reply-To: (Shawn Lin's message of "Wed, 5 Nov 2025 10:04:12 +0800") Message-ID: <87qzud6jq8.fsf@dell.be.48ers.dk> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) Precedence: bulk X-Mailing-List: linux-mmc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable >>>>> "Shawn" =3D=3D Shawn Lin writes: Hi, > From the JESD84-B51, section 7.2.7, > For e=E2=80=A2MMC 4.41 and later devices, indicated by a value larger th= an 4 in > EXT_CSD_REV [192], the 4-bit=E2=80=9Cy=E2=80=9D field shall roll over af= ter 2012, so > that y=3D0 shall be used for 2013. See Table 77 for a list of valid y > values for specific e=E2=80=A2MMC versions. > So mdt_year + 1997 seems wrong, too. That tweak is even not enough, E.G. I see the kernel does: if (card->ext_csd.rev >=3D 5) { /* Adjust production date as per JEDEC JESD84-B451 */ if (card->cid.year < 2010) card->cid.year +=3D 16; 2009 + 16 =3D 2025, so what will happen in a few months? --=20 Bye, Peter Korsgaard