Patch Detail
get:
Show a patch.
patch:
Update a patch.
put:
Update a patch.
GET /api/patches/2216534/?format=api
{ "id": 2216534, "url": "http://patchwork.ozlabs.org/api/patches/2216534/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-mtd/patch/20260326-winbond-v7-0-rc1-cadence-cont-read-v1-3-0d626e1dfb2b@bootlin.com/", "project": { "id": 3, "url": "http://patchwork.ozlabs.org/api/projects/3/?format=api", "name": "Linux MTD development", "link_name": "linux-mtd", "list_id": "linux-mtd.lists.infradead.org", "list_email": "linux-mtd@lists.infradead.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260326-winbond-v7-0-rc1-cadence-cont-read-v1-3-0d626e1dfb2b@bootlin.com>", "list_archive_url": null, "date": "2026-03-26T16:47:17", "name": "[3/4] mtd: spinand: Prevent continuous reads on some controllers", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "da3acd6d8971a900ea13542b961b6a6ffef8efe5", "submitter": { "id": 73368, "url": "http://patchwork.ozlabs.org/api/people/73368/?format=api", "name": "Miquel Raynal", "email": "miquel.raynal@bootlin.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-mtd/patch/20260326-winbond-v7-0-rc1-cadence-cont-read-v1-3-0d626e1dfb2b@bootlin.com/mbox/", "series": [ { "id": 497624, "url": "http://patchwork.ozlabs.org/api/series/497624/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-mtd/list/?series=497624", "date": "2026-03-26T16:47:14", "name": "spi: spi-mem/mtd: spinand: Prevent SPI NAND continuous reads on am65/am62", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/497624/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2216534/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2216534/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n secure) header.d=lists.infradead.org header.i=@lists.infradead.org\n header.a=rsa-sha256 header.s=bombadil.20210309 header.b=iHnrznIC;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n unprotected) header.d=bootlin.com header.i=@bootlin.com header.a=rsa-sha256\n header.s=dkim header.b=EZLRM5cE;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=none (no SPF record) smtp.mailfrom=lists.infradead.org\n (client-ip=2607:7c80:54:3::133; helo=bombadil.infradead.org;\n envelope-from=linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from bombadil.infradead.org (bombadil.infradead.org\n [IPv6:2607:7c80:54:3::133])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fhV7p41Tvz1yGD\n\tfor <incoming@patchwork.ozlabs.org>; Fri, 27 Mar 2026 03:47:50 +1100 (AEDT)", "from localhost ([::1] helo=bombadil.infradead.org)\n\tby bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux))\n\tid 1w5nrx-00000005sts-30l7;\n\tThu, 26 Mar 2026 16:47:41 +0000", "from smtpout-04.galae.net ([185.171.202.116])\n\tby bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux))\n\tid 1w5nrs-00000005spr-0U2a\n\tfor linux-mtd@lists.infradead.org;\n\tThu, 26 Mar 2026 16:47:40 +0000", "from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233])\n\tby smtpout-04.galae.net (Postfix) with ESMTPS id 63B84C5505C;\n\tThu, 26 Mar 2026 16:48:02 +0000 (UTC)", "from mail.galae.net (mail.galae.net [212.83.136.155])\n\tby smtpout-01.galae.net (Postfix) with ESMTPS id 1F771601FA;\n\tThu, 26 Mar 2026 16:47:34 +0000 (UTC)", "from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon)\n with ESMTPSA id C8D0710450015;\n\tThu, 26 Mar 2026 17:47:31 +0100 (CET)" ], "DKIM-Signature": [ "v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;\n\td=lists.infradead.org; s=bombadil.20210309; h=Sender:\n\tContent-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post:\n\tList-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References:Message-Id\n\t:MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description:\n\tResent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:\n\tList-Owner; bh=fbtvU2J9vpUO0ts3Rh3RictqtBocVUX8Qrn130/SGsw=; b=iHnrznICbJ1VeT\n\tYBerDmD3jFpjjAxWBgD7CJ6MEBGg5EpJ6VjTRF+HfA3PDhm3YVrQLrz2ZAIcAIQo7jjGWUT+q0l6/\n\tS/nvVB1w6OFK8YDpEyLRzrOTFhd+UD7fNwP9Itb18seVOfTXbymLVaDcXGSYFOX6RM8VbAe5yiXsO\n\t+wJSK15H+Q7p8QVK3y91Sb3yqyZ7YIDo1t5U/FZs8/oa8YkjKdc6eWtSdcqF+N0qPDhnpqiqfm3cX\n\tCrr20QRB5IAStpTM5sO+V5yl6oAs9E9VMaHZJQm48Ryih8rxMXdXg4eVRKCJPAFeJ1Np8PBEmr7+A\n\twFoNr/FEP7KJR/fnq11Q==;", "v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim;\n\tt=1774543653; h=from:subject:date:message-id:to:cc:mime-version:content-type:\n\t content-transfer-encoding:in-reply-to:references;\n\tbh=teX1nj50p7T/nQpS+gQuoF7Rys4YzHubJDIitOgqOXM=;\n\tb=EZLRM5cEiOd+snGueB87q1ZnE9nd5QmVHSiERyZYLBStCh1LN8Q9RZO6BNIWXTU3AYmkTM\n\tniE3Ny/oV3lX+qZ87kSFXoxluVQYbo9j+JjWeegtV1nXtJkzDGSEWGrmeyiQU/n0w0rHjc\n\t4Xnyq4B8yMEpOUfN2wj36ZpXF9iznaMjFzh3Q4F8cWvFIf83SzI3UIzCtKdTmwDYsFFgoO\n\tsykLNxdAbs83NajR0HIF7OszH1EMTxvvTf67tLSQjSN0wqozGxYYCVSFarz278IuuPJFi2\n\tWwE7tT+nEkg7dq7IVaxaMqhZVNinvAaamU5ZJ0gog77RHQtEdnvzK46D7etD+A==" ], "From": "Miquel Raynal <miquel.raynal@bootlin.com>", "Date": "Thu, 26 Mar 2026 17:47:17 +0100", "Subject": "[PATCH 3/4] mtd: spinand: Prevent continuous reads on some\n controllers", "MIME-Version": "1.0", "Message-Id": "\n <20260326-winbond-v7-0-rc1-cadence-cont-read-v1-3-0d626e1dfb2b@bootlin.com>", "References": "\n <20260326-winbond-v7-0-rc1-cadence-cont-read-v1-0-0d626e1dfb2b@bootlin.com>", "In-Reply-To": "\n <20260326-winbond-v7-0-rc1-cadence-cont-read-v1-0-0d626e1dfb2b@bootlin.com>", "To": "Mark Brown <broonie@kernel.org>, Richard Weinberger <richard@nod.at>,\n Vignesh Raghavendra <vigneshr@ti.com>", "Cc": "Thomas Petazzoni <thomas.petazzoni@bootlin.com>,\n linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org,\n linux-mtd@lists.infradead.org, Michael Walle <mwalle@kernel.org>,\n Takahiro Kuwano <takahiro.kuwano@infineon.com>,\n Pratyush Yadav <pratyush@kernel.org>, Steam Lin <STLin2@winbond.com>,\n Santhosh Kumar K <s-k6@ti.com>, Miquel Raynal <miquel.raynal@bootlin.com>", "X-Mailer": "b4 0.14.3", "X-Last-TLS-Session-Version": "TLSv1.3", "X-CRM114-Version": "20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 ", "X-CRM114-CacheID": "sfid-20260326_094736_300676_97EB93F4 ", "X-CRM114-Status": "GOOD ( 10.27 )", "X-Spam-Score": "-2.1 (--)", "X-Spam-Report": "Spam detection software,\n running on the system \"bombadil.infradead.org\",\n has NOT identified this incoming email as spam. The original\n message has been attached to this so you can view it or label\n similar future email. If you have any questions, see\n the administrator of that system for details.\n Content preview: Some controllers do not have full control over the CS line\n state and may deassert it under certain conditions in the middle of a\n (long)\n transfer. Continuous reads are stopped with a CS deassert,\n hence both features\n cannot live together.\n Content analysis details: (-2.1 points, 5.0 required)\n pts rule name description\n ---- ----------------------\n --------------------------------------------------\n 0.0 RCVD_IN_VALIDITY_CERTIFIED_BLOCKED RBL: ADMINISTRATOR NOTICE: The\n query to Validity was blocked. See\n https://knowledge.validity.com/hc/en-us/articles/20961730681243\n for more information.\n [185.171.202.116 listed in\n sa-trusted.bondedsender.org]\n 0.0 RCVD_IN_VALIDITY_SAFE_BLOCKED RBL: ADMINISTRATOR NOTICE: The query to\n Validity was blocked. See\n https://knowledge.validity.com/hc/en-us/articles/20961730681243\n for more information.\n [185.171.202.116 listed in\n sa-accredit.habeas.com]\n -0.0 SPF_HELO_PASS SPF: HELO matches SPF record\n -0.0 SPF_PASS SPF: sender matches SPF record\n -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from\n author's\n domain\n -0.1 DKIM_VALID Message has at least one valid DKIM or DK\n signature\n -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from\n envelope-from domain\n 0.1 DKIM_SIGNED Message has a DKIM or DK signature,\n not necessarily valid\n -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1%\n [score: 0.0000]\n 0.0 RCVD_IN_VALIDITY_RPBL_BLOCKED RBL: ADMINISTRATOR NOTICE: The query to\n Validity was blocked. See\n https://knowledge.validity.com/hc/en-us/articles/20961730681243\n for more information.\n [185.171.202.116 listed in\n bl.score.senderscore.com]", "X-BeenThere": "linux-mtd@lists.infradead.org", "X-Mailman-Version": "2.1.34", "Precedence": "list", "List-Id": "Linux MTD discussion mailing list <linux-mtd.lists.infradead.org>", "List-Unsubscribe": "<http://lists.infradead.org/mailman/options/linux-mtd>,\n <mailto:linux-mtd-request@lists.infradead.org?subject=unsubscribe>", "List-Archive": "<http://lists.infradead.org/pipermail/linux-mtd/>", "List-Post": "<mailto:linux-mtd@lists.infradead.org>", "List-Help": "<mailto:linux-mtd-request@lists.infradead.org?subject=help>", "List-Subscribe": "<http://lists.infradead.org/mailman/listinfo/linux-mtd>,\n <mailto:linux-mtd-request@lists.infradead.org?subject=subscribe>", "Content-Type": "text/plain; charset=\"us-ascii\"", "Content-Transfer-Encoding": "7bit", "Sender": "\"linux-mtd\" <linux-mtd-bounces@lists.infradead.org>", "Errors-To": "linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org" }, "content": "Some controllers do not have full control over the CS line state and may\ndeassert it under certain conditions in the middle of a (long)\ntransfer.\n\nContinuous reads are stopped with a CS deassert, hence both features\ncannot live together.\n\nWhenever a controller flags that it cannot maintain the CS state\nreliably, disable continuous reads entirely.\n\nSigned-off-by: Miquel Raynal <miquel.raynal@bootlin.com>\n---\nSPI NOR reads are not affected, hence only a solution in SPI NAND is\nneeded.\n---\n drivers/mtd/nand/spi/core.c | 6 ++++--\n 1 file changed, 4 insertions(+), 2 deletions(-)", "diff": "diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c\nindex dbe2c463fe01..82f4dd441541 100644\n--- a/drivers/mtd/nand/spi/core.c\n+++ b/drivers/mtd/nand/spi/core.c\n@@ -951,6 +951,7 @@ static void spinand_cont_read_init(struct spinand_device *spinand)\n {\n \tstruct nand_device *nand = spinand_to_nand(spinand);\n \tenum nand_ecc_engine_type engine_type = nand->ecc.ctx.conf.engine_type;\n+\tstruct spi_controller *ctlr = spinand->spimem->spi->controller;\n \n \t/* OOBs cannot be retrieved so external/on-host ECC engine won't work */\n \tif (spinand->set_cont_read) {\n@@ -962,8 +963,9 @@ static void spinand_cont_read_init(struct spinand_device *spinand)\n \t\t */\n \t\tspinand_cont_read_enable(spinand, false);\n \n-\t\tif (engine_type == NAND_ECC_ENGINE_TYPE_ON_DIE ||\n-\t\t engine_type == NAND_ECC_ENGINE_TYPE_NONE)\n+\t\tif ((engine_type == NAND_ECC_ENGINE_TYPE_ON_DIE ||\n+\t\t engine_type == NAND_ECC_ENGINE_TYPE_NONE) &&\n+\t\t !spi_mem_controller_is_capable(ctlr, no_cs_assertion))\n \t\t\tspinand->cont_read_possible = true;\n \t}\n }\n", "prefixes": [ "3/4" ] }