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 <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Marek Szyprowski <[email protected]>
Cc: Robin Murphy <[email protected]>
Cc: [email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

1 files 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);