linux-kernel - [PATCH 4/5] mips: math-emu: no need to check return value of debugfs

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Date:   Tue, 22 Jan 2019 15:57:41 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>,
        James Hogan <jhogan@...nel.org>,
        John Crispin <john@...ozen.org>
Cc:     linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Yangtao Li <tiny.windzz@...il.com>
Subject: [PATCH 4/5] mips: math-emu: 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: Ralf Baechle <ralf@...ux-mips.org>
Cc: Paul Burton <paul.burton@...s.com>
Cc: James Hogan <jhogan@...nel.org>
Cc: Yangtao Li <tiny.windzz@...il.com>
Cc: linux-mips@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/mips/math-emu/me-debugfs.c | 23 ++++-------------------
 1 file changed, 4 insertions(+), 19 deletions(-)

diff --git a/arch/mips/math-emu/me-debugfs.c b/arch/mips/math-emu/me-debugfs.c
index 58798f527356..387724860fa6 100644
--- a/arch/mips/math-emu/me-debugfs.c
+++ b/arch/mips/math-emu/me-debugfs.c
@@ -189,32 +189,21 @@ static int __init debugfs_fpuemu(void)
 {
 	struct dentry *fpuemu_debugfs_base_dir;
 	struct dentry *fpuemu_debugfs_inst_dir;
-	struct dentry *d, *reset_file;
-
-	if (!mips_debugfs_dir)
-		return -ENODEV;
 
 	fpuemu_debugfs_base_dir = debugfs_create_dir("fpuemustats",
 						     mips_debugfs_dir);
-	if (!fpuemu_debugfs_base_dir)
-		return -ENOMEM;
 
-	reset_file = debugfs_create_file("fpuemustats_clear", 0444,
-					 mips_debugfs_dir, NULL,
-					 &fpuemustats_clear_fops);
-	if (!reset_file)
-		return -ENOMEM;
+	debugfs_create_file("fpuemustats_clear", 0444, mips_debugfs_dir, NULL,
+			    &fpuemustats_clear_fops);
 
 #define FPU_EMU_STAT_OFFSET(m)						\
 	offsetof(struct mips_fpu_emulator_stats, m)
 
 #define FPU_STAT_CREATE(m)						\
 do {									\
-	d = debugfs_create_file(#m, 0444, fpuemu_debugfs_base_dir,	\
+	debugfs_create_file(#m, 0444, fpuemu_debugfs_base_dir,		\
 				(void *)FPU_EMU_STAT_OFFSET(m),		\
 				&fops_fpuemu_stat);			\
-	if (!d)								\
-		return -ENOMEM;						\
 } while (0)
 
 	FPU_STAT_CREATE(emulated);
@@ -233,8 +222,6 @@ do {									\
 
 	fpuemu_debugfs_inst_dir = debugfs_create_dir("instructions",
 						     fpuemu_debugfs_base_dir);
-	if (!fpuemu_debugfs_inst_dir)
-		return -ENOMEM;
 
 #define FPU_STAT_CREATE_EX(m)						\
 do {									\
@@ -242,11 +229,9 @@ do {									\
 									\
 	adjust_instruction_counter_name(name, #m);			\
 									\
-	d = debugfs_create_file(name, 0444, fpuemu_debugfs_inst_dir,	\
+	debugfs_create_file(name, 0444, fpuemu_debugfs_inst_dir,	\
 				(void *)FPU_EMU_STAT_OFFSET(m),		\
 				&fops_fpuemu_stat);			\
-	if (!d)								\
-		return -ENOMEM;						\
 } while (0)
 
 	FPU_STAT_CREATE_EX(abs_s);
-- 
2.20.1