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GET /api/patches/2216506/?format=api
{ "id": 2216506, "url": "http://patchwork.ozlabs.org/api/patches/2216506/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-mtd/patch/20260326-winbond-v6-18-rc1-cont-read-v2-1-643de97a68a3@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-v6-18-rc1-cont-read-v2-1-643de97a68a3@bootlin.com>", "list_archive_url": null, "date": "2026-03-26T16:25:48", "name": "[v2,01/11] mtd: spinand: Drop a too strong limitation", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "93ce5f127c289cce17272267524869be6bd881c2", "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-v6-18-rc1-cont-read-v2-1-643de97a68a3@bootlin.com/mbox/", "series": [ { "id": 497619, "url": "http://patchwork.ozlabs.org/api/series/497619/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-mtd/list/?series=497619", "date": "2026-03-26T16:25:47", "name": "[v2,01/11] mtd: spinand: Drop a too strong limitation", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/497619/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2216506/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2216506/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=FUQy0fsF;\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=IXFbR8p6;\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; 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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=m6s0/e4spWsiZYvPvQZxOoQPjavY5bgpLhFj8tnNVX4=; b=FUQy0fsFa0oLFD\n\tWRndK/YC1JmonilPwlABp6rnoVE3WW8HHZsrxqOYe1yNUwRkPexIYz/skiOqQG7ds2USgvsVn1fFd\n\tokV9q/iO0pign59j1kWmsNPqgCbNeglpDeVzVauo4vjFitmlviz+EQdUbia7RO1hiEMr+Pl2gicPX\n\t6H2S38TT9KV+cO/r+Sk72ZHQ+uiRITEIRQyR2AKHf/0d97EJcki3hHajAjg8k7w0BHteFX1O6UtO6\n\tPSM1PxChJA25SXVCbtZxr+hZf0WsaJ23p1AtV9WiX7CQ1CMWNRel4TD4n9ejoo3dc7hu1iVsGW66l\n\t9L14DbsojdcfT1BxaFcw==;", "v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim;\n\tt=1774542367; h=from:subject:date:message-id:to:cc:mime-version:content-type:\n\t content-transfer-encoding:in-reply-to:references;\n\tbh=QHp/XpnDc6VCjq7Z0fA22iB0i5XtlmN2AieaCNd4Ovs=;\n\tb=IXFbR8p6lsJT/2f6E3hDXOp7rvLkQdRT63ruqh/UP9hGiIBruK7rTY1bsyi2UK9A2zAFQX\n\tiEFYEOrDZ2e4P9wAal/136ejBloxyx5cQXlp62khWj6gyOhNl6ef0tbxVYA/b97P4RtHFc\n\tomhzZZVanMUzBeeruhIhKZzHe5dQHZjrC0WMgolWSXV7Buu9oWraSlmHm6TYXijPraaPTz\n\tMC/ao3fMtnzduuP9HU7aAJW+ot4v4mgTyk52f056ttWYMYng6ITUx60PFyDnU3z7TJGmv2\n\tWa7bj+Iu9QOiBEpXDilMLrb8FkQNOMe//So9L8wMcVqkABE7UQKiYrMagH17Kw==" ], "From": "Miquel Raynal <miquel.raynal@bootlin.com>", "Date": "Thu, 26 Mar 2026 17:25:48 +0100", "Subject": "[PATCH v2 01/11] mtd: spinand: Drop a too strong limitation", "MIME-Version": "1.0", "Message-Id": "\n <20260326-winbond-v6-18-rc1-cont-read-v2-1-643de97a68a3@bootlin.com>", "References": "\n <20260326-winbond-v6-18-rc1-cont-read-v2-0-643de97a68a3@bootlin.com>", "In-Reply-To": "\n <20260326-winbond-v6-18-rc1-cont-read-v2-0-643de97a68a3@bootlin.com>", "To": "Mark Brown <broonie@kernel.org>, Richard Weinberger <richard@nod.at>,\n Vignesh Raghavendra <vigneshr@ti.com>, Michael Walle <mwalle@kernel.org>,\n Miquel Raynal <miquel.raynal@bootlin.com>", "Cc": "Pratyush Yadav <pratyush@kernel.org>,\n Thomas Petazzoni <thomas.petazzoni@bootlin.com>,\n Steam Lin <STLin2@winbond.com>, Santhosh Kumar K <s-k6@ti.com>,\n linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org,\n linux-mtd@lists.infradead.org", "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_092614_213891_5C565C21 ", "X-CRM114-Status": "GOOD ( 15.13 )", "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: Since continuous reads may sometimes not be able to go past\n an erase block boundary, it has been decided not to attempt longer reads\n and if the user request is bigger, it will be split across eraseblo [...]\n Content analysis details: (-2.1 points, 5.0 required)\n pts rule name description\n ---- ----------------------\n --------------------------------------------------\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 [185.246.84.56 listed in\n bl.score.senderscore.com]\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 [185.246.84.56 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 [185.246.84.56 listed in 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]", "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": "Since continuous reads may sometimes not be able to go past an erase\nblock boundary, it has been decided not to attempt longer reads and if\nthe user request is bigger, it will be split across eraseblocks.\n\nAs these request will anyway be handled correctly, there is no reason to\nfilter out cases where we would go over a target or a die, so drop this\nlimitation which had a side effect: any request to read more than the\ncontent of an eraseblock would simply not benefit from the continuous\nread feature.\n\nSigned-off-by: Miquel Raynal <miquel.raynal@bootlin.com>\n---\n drivers/mtd/nand/spi/core.c | 19 ++++++-------------\n 1 file changed, 6 insertions(+), 13 deletions(-)", "diff": "diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c\nindex 66c90419f6d5..fba3cc213c88 100644\n--- a/drivers/mtd/nand/spi/core.c\n+++ b/drivers/mtd/nand/spi/core.c\n@@ -878,6 +878,12 @@ static int spinand_mtd_continuous_page_read(struct mtd_info *mtd, loff_t from,\n \t * Each data read must be a multiple of 4-bytes and full pages should be read;\n \t * otherwise, the data output might get out of sequence from one read command\n \t * to another.\n+\t *\n+\t * Continuous reads never cross LUN boundaries. Some devices don't\n+\t * support crossing planes boundaries. Some devices don't even support\n+\t * crossing blocks boundaries. The common case being to read through UBI,\n+\t * we will very rarely read two consequent blocks or more, so let's only enable\n+\t * continuous reads when reading within the same erase block.\n \t */\n \tnanddev_io_for_each_block(nand, NAND_PAGE_READ, from, ops, &iter) {\n \t\tret = spinand_select_target(spinand, iter.req.pos.target);\n@@ -968,19 +974,6 @@ static bool spinand_use_cont_read(struct mtd_info *mtd, loff_t from,\n \tnanddev_offs_to_pos(nand, from, &start_pos);\n \tnanddev_offs_to_pos(nand, from + ops->len - 1, &end_pos);\n \n-\t/*\n-\t * Continuous reads never cross LUN boundaries. Some devices don't\n-\t * support crossing planes boundaries. Some devices don't even support\n-\t * crossing blocks boundaries. The common case being to read through UBI,\n-\t * we will very rarely read two consequent blocks or more, so it is safer\n-\t * and easier (can be improved) to only enable continuous reads when\n-\t * reading within the same erase block.\n-\t */\n-\tif (start_pos.target != end_pos.target ||\n-\t start_pos.plane != end_pos.plane ||\n-\t start_pos.eraseblock != end_pos.eraseblock)\n-\t\treturn false;\n-\n \treturn start_pos.page < end_pos.page;\n }\n \n", "prefixes": [ "v2", "01/11" ] }