From: Petr Malat Date: Fri, 30 Apr 2021 06:50:57 +0000 (+0200) Subject: mtd: Create partname and partid debug files for child MTDs X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=feb05fae4df10f6b9bf720662623efc88334c095;p=linux.git 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 --- diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index 3f2e20e22501a..3ae261661eea2 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); }