From 1be51474f99bcfdecef3f34b9a9a8cf4393fd8f9 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Wed, 12 Jun 2019 16:43:14 +0200 Subject: [PATCH] swiotlb: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Konrad Rzeszutek Wilk Cc: Christoph Hellwig Cc: Marek Szyprowski Cc: Robin Murphy Cc: iommu@lists.linux-foundation.org Signed-off-by: Greg Kroah-Hartman Link: https://lore.kernel.org/r/20190612144314.GA16803@kroah.com Signed-off-by: Greg Kroah-Hartman --- kernel/dma/swiotlb.c | 25 ++++--------------------- 1 file changed, 4 insertions(+), 21 deletions(-) diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index 13f0cb080a4d..62fa5a82a065 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -696,29 +696,12 @@ bool is_swiotlb_active(void) static int __init swiotlb_create_debugfs(void) { - struct dentry *d_swiotlb_usage; - struct dentry *ent; - - d_swiotlb_usage = debugfs_create_dir("swiotlb", NULL); - - if (!d_swiotlb_usage) - return -ENOMEM; - - ent = debugfs_create_ulong("io_tlb_nslabs", 0400, - d_swiotlb_usage, &io_tlb_nslabs); - if (!ent) - goto fail; - - ent = debugfs_create_ulong("io_tlb_used", 0400, - d_swiotlb_usage, &io_tlb_used); - if (!ent) - goto fail; + struct dentry *root; + root = debugfs_create_dir("swiotlb", NULL); + debugfs_create_ulong("io_tlb_nslabs", 0400, root, &io_tlb_nslabs); + debugfs_create_ulong("io_tlb_used", 0400, root, &io_tlb_used); return 0; - -fail: - debugfs_remove_recursive(d_swiotlb_usage); - return -ENOMEM; } late_initcall(swiotlb_create_debugfs);