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 B81DCC433F5 for ; Tue, 21 Dec 2021 18:43:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:CC:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=bzwYKWwKR29HpoW9DVD7LIfOTyY/KuGWlB71Bu9B+1A=; b=TFQTswP1e8lA35 UhsqjkQK1ISY+PzgEyVMnCismn470lP+CQ6ftfZ1Ez75mZyyvk8SINlwuTUwo3Jy97xLFncyxMaT5 2amLh1o4kKuiSLWZZRFzeDDgGl33Yun/kq8XHaSIPw32MF+bPxNmYbFju+owioXSp7rVopNuRv7l0 DJNbd6eMIHiq/QY1tZOQL4vrg+8nti+efG4LLoQd2xcfoGOMWYuF2GyE5wq2LNu/9lbbSUmI9qq+5 0ePpYtczOVjRybhGrRUZQVajJgIeyvYjqyx8I4iWx5Rm0Cf4eDwzK5WvZP13/o6JgbSJnnvL7nShU E+bR0PsCFWEfpeL0kIZg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mzk5v-0088sw-Lp; Tue, 21 Dec 2021 18:42:39 +0000 Received: from lelv0143.ext.ti.com ([198.47.23.248]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mzk5K-0088hx-9N for linux-mtd@lists.infradead.org; Tue, 21 Dec 2021 18:42:04 +0000 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id 1BLIfqgG112219; Tue, 21 Dec 2021 12:41:52 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1640112112; bh=aLRckghuZIZgRpANh5EJJ7wkLHZv7TBPJZa7KiUv/ss=; h=Date:From:To:CC:Subject:References:In-Reply-To; b=V60k8UylfO2mhZrH+uNe18qEMxs516y35e348j1I5ccPi7q1B1M/6/anlb6ymsf7C f76LU3zApUVieJqBKqgheh9Hd8Bmo40tTdG5JkIFoPHUE0t2zqgFEabiC9DuL2D1z0 3S0x8e0+OduGP6oFKSOd559xlJUfDHkbYM9xQdfQ= Received: from DLEE110.ent.ti.com (dlee110.ent.ti.com [157.170.170.21]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 1BLIfqRl038931 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 21 Dec 2021 12:41:52 -0600 Received: from DLEE104.ent.ti.com (157.170.170.34) by DLEE110.ent.ti.com (157.170.170.21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14; Tue, 21 Dec 2021 12:41:52 -0600 Received: from fllv0040.itg.ti.com (10.64.41.20) by DLEE104.ent.ti.com (157.170.170.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14 via Frontend Transport; Tue, 21 Dec 2021 12:41:51 -0600 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 1BLIfpY5077765; Tue, 21 Dec 2021 12:41:51 -0600 Date: Wed, 22 Dec 2021 00:11:50 +0530 From: Pratyush Yadav To: Miquel Raynal CC: Richard Weinberger , Vignesh Raghavendra , Tudor Ambarus , Michael Walle , , Mark Brown , , Julien Su , Jaime Liao , Boris Brezillon , Thomas Petazzoni , Xiangsheng Hou Subject: Re: [PATCH v8 01/14] spi: spi-mem: reject partial cycle transfers in Message-ID: <20211221184148.pw4blwxdvxcoerjo@ti.com> References: <20211221174844.56385-1-miquel.raynal@bootlin.com> <20211221174844.56385-2-miquel.raynal@bootlin.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20211221174844.56385-2-miquel.raynal@bootlin.com> User-Agent: NeoMutt/20171215 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211221_104202_475273_4DE65F5C X-CRM114-Status: GOOD ( 10.52 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org Hi, On 21/12/21 06:48PM, Miquel Raynal wrote: > From: Pratyush Yadav > > In 8D-8D-8D mode two bytes are transferred per cycle. So an odd number > of bytes cannot be transferred because it would leave a residual half > cycle at the end. Consider such a transfer invalid and reject it. > > Signed-off-by: Pratyush Yadav > Reviewed-by: Mark Brown > Signed-off-by: Miquel Raynal Sorry, I didn't realize this before. This patch would break a couple of SPI NOR flashes. You need patch 1, 2, and 3 from my series as well to make sure this does not happen. Since those patches have some pending comments, can you just drop this patch and I will re-roll it on top of your series later when I can find some time for it? Again, sorry for not noticing this before. -- Regards, Pratyush Yadav Texas Instruments Inc. ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/