On Sat, Dec 14, 2013 at 1:44 PM, Greg KH <gre...@linuxfoundation.org> wrote: > On Sat, Dec 14, 2013 at 01:10:38PM -0800, Colin Cross wrote: >> On Sat, Dec 14, 2013 at 8:52 AM, Greg KH <gre...@linuxfoundation.org> wrote: >> > On Fri, Dec 13, 2013 at 02:23:35PM -0800, John Stultz wrote: >> >> + idev->debug_root = debugfs_create_dir("ion", NULL); >> >> + if (IS_ERR_OR_NULL(idev->debug_root)) >> >> + pr_err("ion: failed to create debug files.\n"); >> > >> > There's no need to check for this at all, you just printed out an error >> > message if CONFIG_DEBUGFS is not enabled, which isn't all that nice. >> > >> > Something to clean up later, no big deal now. >> >> Patch 75/115 (ion: remove IS_ERR_OR_NULL) replaces this chunk with: >> idev->debug_root = debugfs_create_dir("ion", NULL); >> if (!idev->debug_root) >> pr_err("ion: failed to create debug files.\n"); >> which won't print an error if debugfs is disabled. > > If debugfs is disabled, debugfs_create_dir() returns ERR_PTR(-ENODEV).
ERR_PTR(-ENODEV) is not NULL, so this won't print an error. I thought that was the point of returning ERR_PTR when disabled and NULL when enabled. > So are you sure you tested this? :) I have not tested this, but it seems correct to me. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/