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| author | Mario Rugiero <mrugiero@gmail.com> | 2017-05-29 14:38:41 +0300 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2017-07-21 23:25:29 +0300 |
| commit | e8e3edb95ce6a146bc774b6cfad3553f4383edc8 (patch) | |
| tree | 53cc03ba5c33a3feb27ea46cfc61cc979dfe9651 /drivers/mtd/mtdswap.c | |
| parent | 5771a8c08880cdca3bfb4a3fc6d309d6bba20877 (diff) | |
| download | linux-e8e3edb95ce6a146bc774b6cfad3553f4383edc8.tar.xz | |
mtd: create per-device and module-scope debugfs entries
Several MTD devices are using debugfs entries created in the root.
This commit provides the means for a standardized subtree, creating
one "mtd" entry at root, and one entry per device inside it, named
after the device.
The tree is registered in add_mtd_device, and released in
del_mtd_device.
Devices docg3, mtdswap and nandsim were updated to use this subtree
instead of custom ones, and their entries were prefixed with the
drivers' names.
Signed-off-by: Mario J. Rugiero <mrugiero@gmail.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'drivers/mtd/mtdswap.c')
| -rw-r--r-- | drivers/mtd/mtdswap.c | 18 |
1 files changed, 4 insertions, 14 deletions
diff --git a/drivers/mtd/mtdswap.c b/drivers/mtd/mtdswap.c index f12879a3d4ff..6b17932fe557 100644 --- a/drivers/mtd/mtdswap.c +++ b/drivers/mtd/mtdswap.c @@ -138,8 +138,6 @@ struct mtdswap_dev { char *page_buf; char *oob_buf; - - struct dentry *debugfs_root; }; struct mtdswap_oobdata { @@ -1318,26 +1316,19 @@ static int mtdswap_add_debugfs(struct mtdswap_dev *d) struct gendisk *gd = d->mbd_dev->disk; struct device *dev = disk_to_dev(gd); - struct dentry *root; + struct dentry *root = d->mtd->dbg.dfs_dir; struct dentry *dent; - root = debugfs_create_dir(gd->disk_name, NULL); - if (IS_ERR(root)) + if (!IS_ENABLED(CONFIG_DEBUG_FS)) return 0; - if (!root) { - dev_err(dev, "failed to initialize debugfs\n"); + if (IS_ERR_OR_NULL(root)) return -1; - } - - d->debugfs_root = root; - dent = debugfs_create_file("stats", S_IRUSR, root, d, + dent = debugfs_create_file("mtdswap_stats", S_IRUSR, root, d, &mtdswap_fops); if (!dent) { dev_err(d->dev, "debugfs_create_file failed\n"); - debugfs_remove_recursive(root); - d->debugfs_root = NULL; return -1; } @@ -1540,7 +1531,6 @@ static void mtdswap_remove_dev(struct mtd_blktrans_dev *dev) { struct mtdswap_dev *d = MTDSWAP_MBD_TO_MTDSWAP(dev); - debugfs_remove_recursive(d->debugfs_root); del_mtd_blktrans_dev(dev); mtdswap_cleanup(d); kfree(d); |