From 993b70a42992a9e24524f2a637624f6c3cabf334 Mon Sep 17 00:00:00 2001 From: John Thomson Date: Tue, 17 May 2022 11:15:45 +1000 Subject: [PATCH] kernel: fix variable erasesize patch MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Update this pending patch to remove the untested (variable eraseregions) section, alongside simplifying the patch. Signed-off-by: John Thomson [refresh and split out unrelated refreshes] Signed-off-by: Thibaut VARÈNE (cherry picked from commit 4f7065ed250932d6ff725ba175e734ad4c782f14) --- ...support-for-minor-aligned-partitions.patch | 272 +++++------------- 1 file changed, 64 insertions(+), 208 deletions(-) diff --git a/target/linux/generic/pending-5.10/402-mtd-spi-nor-write-support-for-minor-aligned-partitions.patch b/target/linux/generic/pending-5.10/402-mtd-spi-nor-write-support-for-minor-aligned-partitions.patch index f7ebedb44e..c634ae9aeb 100644 --- a/target/linux/generic/pending-5.10/402-mtd-spi-nor-write-support-for-minor-aligned-partitions.patch +++ b/target/linux/generic/pending-5.10/402-mtd-spi-nor-write-support-for-minor-aligned-partitions.patch @@ -1,159 +1,10 @@ -From patchwork Tue Jun 8 04:07:19 2021 -Content-Type: text/plain; charset="utf-8" -MIME-Version: 1.0 -Content-Transfer-Encoding: 7bit -X-Patchwork-Submitter: John Thomson -X-Patchwork-Id: 1489105 -X-Patchwork-Delegate: tudor.ambarus@gmail.com -Return-Path: - -X-Original-To: incoming@patchwork.ozlabs.org -Delivered-To: patchwork-incoming@bilbo.ozlabs.org -Authentication-Results: ozlabs.org; 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Tue, - 8 Jun 2021 00:07:35 -0400 (EDT) +From cd13e2cd28bf7313b6ad6986bb8d63ea98b37a48 Mon Sep 17 00:00:00 2001 From: John Thomson -To: Miquel Raynal , - Richard Weinberger , Vignesh Raghavendra , - Tudor Ambarus , - Michael Walle , Pratyush Yadav , - linux-mtd@lists.infradead.org -Cc: linux-kernel@vger.kernel.org, - John Thomson , - kernel test robot , Dan Carpenter +Date: Fri, 25 Dec 2020 18:50:08 +1000 Subject: [PATCH] mtd: spi-nor: write support for minor aligned partitions -Date: Tue, 8 Jun 2021 14:07:19 +1000 -Message-Id: <20210608040719.14431-1-git@johnthomson.fastmail.com.au> -X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 -X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 -X-CRM114-CacheID: sfid-20210607_210745_712053_67A7D864 -X-CRM114-Status: GOOD ( 26.99 ) -X-Spam-Score: -0.8 (/) -X-Spam-Report: Spam detection software, - running on the system "bombadil.infradead.org", - has NOT identified this incoming email as spam. The original - message has been attached to this so you can view it or label - similar future email. If you have any questions, see - the administrator of that system for details. - Content preview: Do not prevent writing to mtd partitions where a partition - boundary sits on a minor erasesize boundary. This addresses a FIXME that - has been present since the start of the linux git history: /* Doesn' [...] - Content analysis details: (-0.8 points, 5.0 required) - pts rule name description - ---- ---------------------- - -------------------------------------------------- - -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at https://www.dnswl.org/, - low trust [66.111.4.221 listed in list.dnswl.org] - -0.0 SPF_PASS SPF: sender matches SPF record - -0.0 SPF_HELO_PASS SPF: HELO matches SPF record - 0.0 RCVD_IN_MSPIKE_H3 RBL: Good reputation (+3) - [66.111.4.221 listed in wl.mailspike.net] - -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature - 0.1 DKIM_SIGNED Message has a DKIM or DK signature, - not necessarily - valid - -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from - envelope-from domain - 0.0 RCVD_IN_MSPIKE_WL Mailspike good senders -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: , - -Sender: "linux-mtd" -Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit Do not prevent writing to mtd partitions where a partition boundary sits on a minor erasesize boundary. @@ -197,26 +48,65 @@ user 0m 0.00s |0m 0.00s |0m 0.01s sys 0m 46.94s |0m 50.38s |2m 12.46s Signed-off-by: John Thomson +Signed-off-by: Thibaut VARÈNE + --- -Have not tested on variable erase regions device. checkpatch does not like the printk(KERN_WARNING these should be changed separately beforehand? +Changes v1 -> v2: +Added mtdcore sysfs for erasesize_minor +Removed finding minor erasesize for variable erase regions device, +as untested and no responses regarding it. +Moved IF_ENABLED for SPINOR variable erase to guard setting +erasesize_minor in spi-nor/core.c +Removed setting erasesize to minor where partition boundaries require +minor erase to be writable +Simplified minor boundary check by relying on minor being a factor of +major + Changes RFC -> v1: Fix uninitialized variable smatch warning Reported-by: kernel test robot Reported-by: Dan Carpenter --- - drivers/mtd/mtdpart.c | 52 ++++++++++++++++++++++++++++--------- - drivers/mtd/spi-nor/Kconfig | 10 +++++++ - drivers/mtd/spi-nor/core.c | 10 +++++-- + drivers/mtd/mtdcore.c | 10 ++++++++++ + drivers/mtd/mtdpart.c | 35 +++++++++++++++++++++++++---------- + drivers/mtd/spi-nor/Kconfig | 10 ++++++++++ + drivers/mtd/spi-nor/core.c | 11 +++++++++-- include/linux/mtd/mtd.h | 2 ++ - 4 files changed, 60 insertions(+), 14 deletions(-) + 5 files changed, 56 insertions(+), 12 deletions(-) +--- a/drivers/mtd/mtdcore.c ++++ b/drivers/mtd/mtdcore.c +@@ -163,6 +163,15 @@ static ssize_t mtd_erasesize_show(struct + } + static DEVICE_ATTR(erasesize, S_IRUGO, mtd_erasesize_show, NULL); + ++static ssize_t mtd_erasesize_minor_show(struct device *dev, ++ struct device_attribute *attr, char *buf) ++{ ++ struct mtd_info *mtd = dev_get_drvdata(dev); ++ ++ return snprintf(buf, PAGE_SIZE, "%lu\n", (unsigned long)mtd->erasesize_minor); ++} ++static DEVICE_ATTR(erasesize_minor, S_IRUGO, mtd_erasesize_minor_show, NULL); ++ + static ssize_t mtd_writesize_show(struct device *dev, + struct device_attribute *attr, char *buf) + { +@@ -312,6 +321,7 @@ static struct attribute *mtd_attrs[] = { + &dev_attr_flags.attr, + &dev_attr_size.attr, + &dev_attr_erasesize.attr, ++ &dev_attr_erasesize_minor.attr, + &dev_attr_writesize.attr, + &dev_attr_subpagesize.attr, + &dev_attr_oobsize.attr, --- a/drivers/mtd/mtdpart.c +++ b/drivers/mtd/mtdpart.c -@@ -40,10 +40,11 @@ static struct mtd_info *allocate_partiti +@@ -40,6 +40,7 @@ static struct mtd_info *allocate_partiti struct mtd_info *master = mtd_get_master(parent); int wr_alignment = (parent->flags & MTD_NO_ERASE) ? master->writesize : master->erasesize; @@ -224,54 +114,22 @@ Reported-by: Dan Carpenter u64 parent_size = mtd_is_partition(parent) ? parent->part.size : parent->size; struct mtd_info *child; -- u32 remainder; -+ u32 remainder, remainder_minor; - char *name; - u64 tmp; - -@@ -145,6 +146,7 @@ static struct mtd_info *allocate_partiti - int i, max = parent->numeraseregions; - u64 end = child->part.offset + child->part.size; - struct mtd_erase_region_info *regions = parent->eraseregions; -+ uint32_t erasesize_minor = child->erasesize; - - /* Find the first erase regions which is part of this - * partition. */ -@@ -155,15 +157,24 @@ static struct mtd_info *allocate_partiti - if (i > 0) - i--; - -- /* Pick biggest erasesize */ - for (; i < max && regions[i].offset < end; i++) { -+ /* Pick biggest erasesize */ - if (child->erasesize < regions[i].erasesize) - child->erasesize = regions[i].erasesize; -+ /* Pick smallest non-zero erasesize */ -+ if ((erasesize_minor > regions[i].erasesize) && (regions[i].erasesize > 0)) -+ erasesize_minor = regions[i].erasesize; - } -+ -+ if (erasesize_minor < child->erasesize) -+ child->erasesize_minor = erasesize_minor; -+ - BUG_ON(child->erasesize == 0); +@@ -164,6 +165,7 @@ static struct mtd_info *allocate_partiti } else { /* Single erase size */ child->erasesize = master->erasesize; -+ if (master->erasesize_minor) -+ child->erasesize_minor = master->erasesize_minor; ++ child->erasesize_minor = master->erasesize_minor; } /* -@@ -171,26 +182,43 @@ static struct mtd_info *allocate_partiti +@@ -171,26 +173,39 @@ static struct mtd_info *allocate_partiti * exposes several regions with different erasesize. Adjust * wr_alignment accordingly. */ - if (!(child->flags & MTD_NO_ERASE)) + if (!(child->flags & MTD_NO_ERASE)) { wr_alignment = child->erasesize; -+ if (IS_ENABLED(CONFIG_MTD_SPI_NOR_USE_VARIABLE_ERASE) && child->erasesize_minor) -+ wr_alignment_minor = child->erasesize_minor; ++ wr_alignment_minor = child->erasesize_minor; + } tmp = mtd_get_master_ofs(child, 0); @@ -284,13 +142,11 @@ Reported-by: Dan Carpenter - printk(KERN_WARNING"mtd: partition \"%s\" doesn't start on an erase/write block boundary -- force read-only\n", - part->name); + if (wr_alignment_minor) { -+ tmp = mtd_get_master_ofs(child, 0); -+ remainder_minor = do_div(tmp, wr_alignment_minor); -+ if (remainder_minor == 0) -+ child->erasesize = child->erasesize_minor; ++ /* rely on minor being a factor of major erasesize */ ++ tmp = remainder; ++ remainder = do_div(tmp, wr_alignment_minor); + } -+ -+ if ((!wr_alignment_minor) || (wr_alignment_minor && remainder_minor != 0)) { ++ if (remainder) { + child->flags &= ~MTD_WRITEABLE; + printk(KERN_WARNING"mtd: partition \"%s\" doesn't start on an erase/write block boundary -- force read-only\n", + part->name); @@ -304,12 +160,11 @@ Reported-by: Dan Carpenter - printk(KERN_WARNING"mtd: partition \"%s\" doesn't end on an erase/write block -- force read-only\n", - part->name); + if (wr_alignment_minor) { -+ tmp = mtd_get_master_ofs(child, 0) + child->part.size; -+ remainder_minor = do_div(tmp, wr_alignment_minor); -+ if (remainder_minor == 0) -+ child->erasesize = child->erasesize_minor; ++ tmp = remainder; ++ remainder = do_div(tmp, wr_alignment_minor); + } -+ if ((!wr_alignment_minor) || (wr_alignment_minor && remainder_minor != 0)) { ++ ++ if (remainder) { + child->flags &= ~MTD_WRITEABLE; + printk(KERN_WARNING"mtd: partition \"%s\" doesn't end on an erase/write block -- force read-only\n", + part->name); @@ -367,11 +222,12 @@ Reported-by: Dan Carpenter } } -@@ -2610,6 +2614,8 @@ static int spi_nor_select_erase(struct s +@@ -2610,6 +2614,9 @@ static int spi_nor_select_erase(struct s return -EINVAL; mtd->erasesize = erase->size; -+ if (erase_minor && erase_minor->size < erase->size) ++ if (IS_ENABLED(CONFIG_MTD_SPI_NOR_USE_VARIABLE_ERASE) && ++ erase_minor && erase_minor->size < erase->size) + mtd->erasesize_minor = erase_minor->size; return 0; } -- 2.30.2