linux-kernel - [tip:x86/microcode] x86/microcode/intel: Simplify generic_load

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Date:   Tue, 25 Oct 2016 09:28:47 -0700
From:   tip-bot for Borislav Petkov <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     luto@...nel.org, hpa@...or.com, mingo@...nel.org, bp@...en8.de,
        jpoimboe@...hat.com, peterz@...radead.org, brgerst@...il.com,
        linux-kernel@...r.kernel.org, bp@...e.de, tglx@...utronix.de,
        dvlasenk@...hat.com, torvalds@...ux-foundation.org
Subject: [tip:x86/microcode] x86/microcode/intel: Simplify
 generic_load_microcode()

Commit-ID:  f61337d9841210329c177a20061f49fafff3ff76
Gitweb:     http://git.kernel.org/tip/f61337d9841210329c177a20061f49fafff3ff76
Author:     Borislav Petkov <bp@...e.de>
AuthorDate: Tue, 25 Oct 2016 11:55:13 +0200
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 25 Oct 2016 12:28:57 +0200

x86/microcode/intel: Simplify generic_load_microcode()

Make it return the ucode_state directly instead of assigning to a state
variable and jumping to an out: label.

No functionality change.

Signed-off-by: Borislav Petkov <bp@...e.de>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Brian Gerst <brgerst@...il.com>
Cc: Denys Vlasenko <dvlasenk@...hat.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Link: http://lkml.kernel.org/r/20161025095522.11964-4-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/cpu/microcode/intel.c | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c
index cdc0dea..b84288e 100644
--- a/arch/x86/kernel/cpu/microcode/intel.c
+++ b/arch/x86/kernel/cpu/microcode/intel.c
@@ -962,7 +962,6 @@ static enum ucode_state generic_load_microcode(int cpu, void *data, size_t size,
 	u8 *ucode_ptr = data, *new_mc = NULL, *mc = NULL;
 	int new_rev = uci->cpu_sig.rev;
 	unsigned int leftover = size;
-	enum ucode_state state = UCODE_OK;
 	unsigned int curr_mc_size = 0;
 	unsigned int csig, cpf;
 
@@ -1015,14 +1014,11 @@ static enum ucode_state generic_load_microcode(int cpu, void *data, size_t size,
 
 	if (leftover) {
 		vfree(new_mc);
-		state = UCODE_ERROR;
-		goto out;
+		return UCODE_ERROR;
 	}
 
-	if (!new_mc) {
-		state = UCODE_NFOUND;
-		goto out;
-	}
+	if (!new_mc)
+		return UCODE_NFOUND;
 
 	vfree(uci->mc);
 	uci->mc = (struct microcode_intel *)new_mc;
@@ -1036,8 +1032,8 @@ static enum ucode_state generic_load_microcode(int cpu, void *data, size_t size,
 
 	pr_debug("CPU%d found a matching microcode update with version 0x%x (current=0x%x)\n",
 		 cpu, new_rev, uci->cpu_sig.rev);
-out:
-	return state;
+
+	return UCODE_OK;
 }
 
 static int get_ucode_fw(void *to, const void *from, size_t n)