On 11/16/2016 12:09 AM, Sudip Mukherjee wrote:
> debugfs_create_dir() and debugfs_create_file() returns NULL on error or
> a pointer on success. They do not return the error value with ERR_PTR.
> So we should not check the return with IS_ERR_OR_NULL, instead we
> should just check for NULL.
>
> Signed-off-by: Sudip Mukherjee <sudip.mukher...@codethink.co.uk>
> ---
> drivers/mtd/nand/nandsim.c | 9 +++------
> 1 file changed, 3 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/mtd/nand/nandsim.c b/drivers/mtd/nand/nandsim.c
> index c76287a..9b0d79a 100644
> --- a/drivers/mtd/nand/nandsim.c
> +++ b/drivers/mtd/nand/nandsim.c
> @@ -525,15 +525,13 @@ static int nandsim_debugfs_create(struct nandsim *dev)
> {
> struct nandsim_debug_info *dbg = &dev->dbg;
> struct dentry *dent;
> - int err;
> + int err = -ENODEV;
Why don't you just nuke the err altogether and just return -ENODEV ?
> if (!IS_ENABLED(CONFIG_DEBUG_FS))
> return 0;
>
> dent = debugfs_create_dir("nandsim", NULL);
> - if (IS_ERR_OR_NULL(dent)) {
> - int err = dent ? -ENODEV : PTR_ERR(dent);
> -
> + if (!dent) {
> NS_ERR("cannot create \"nandsim\" debugfs directory, err %d\n",
> err);
> return err;
> @@ -542,7 +540,7 @@ static int nandsim_debugfs_create(struct nandsim *dev)
>
> dent = debugfs_create_file("wear_report", S_IRUSR,
> dbg->dfs_root, dev, &dfs_fops);
> - if (IS_ERR_OR_NULL(dent))
> + if (!dent)
> goto out_remove;
> dbg->dfs_wear_report = dent;
>
> @@ -550,7 +548,6 @@ static int nandsim_debugfs_create(struct nandsim *dev)
>
> out_remove:
> debugfs_remove_recursive(dbg->dfs_root);
> - err = dent ? PTR_ERR(dent) : -ENODEV;
> return err;
> }
>
>
--
Best regards,
Marek Vasut
