From feb05fae4df10f6b9bf720662623efc88334c095 Mon Sep 17 00:00:00 2001 From: Petr Malat Date: Fri, 30 Apr 2021 08:50:57 +0200 Subject: [PATCH] mtd: Create partname and partid debug files for child MTDs Partname and partid are set by the upper driver (spi-nor) on the master MTD. If this MTD is partitioned and CONFIG_MTD_PARTITIONED_MASTER is disabled, the master MTD is not instantiated and partname and partid aren't available to the userspace. Always read the partname and partid from the master MTD, they describe the HW, which can't differ between master and its children. Signed-off-by: Petr Malat Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20210430065057.32018-1-oss@malat.biz --- drivers/mtd/mtdcore.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index 3f2e20e22501..3ae261661eea 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -360,6 +360,7 @@ static struct dentry *dfs_dir_mtd; static void mtd_debugfs_populate(struct mtd_info *mtd) { + struct mtd_info *master = mtd_get_master(mtd); struct device *dev = &mtd->dev; struct dentry *root; @@ -369,12 +370,12 @@ static void mtd_debugfs_populate(struct mtd_info *mtd) root = debugfs_create_dir(dev_name(dev), dfs_dir_mtd); mtd->dbg.dfs_dir = root; - if (mtd->dbg.partid) - debugfs_create_file("partid", 0400, root, mtd, + if (master->dbg.partid) + debugfs_create_file("partid", 0400, root, master, &mtd_partid_debug_fops); - if (mtd->dbg.partname) - debugfs_create_file("partname", 0400, root, mtd, + if (master->dbg.partname) + debugfs_create_file("partname", 0400, root, master, &mtd_partname_debug_fops); } -- 2.20.1