x86/speculation: Clean up spectre_v2_parse_cmdline()

Remove the unnecessary 'else' statement in spectre_v2_parse_cmdline()
to save an indentation level.

Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Woodhouse <dwmw@amazon.co.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Casey Schaufler <casey.schaufler@intel.com>
Cc: Asit Mallick <asit.k.mallick@intel.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Jon Masters <jcm@redhat.com>
Cc: Waiman Long <longman9394@gmail.com>
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: Dave Stewart <david.c.stewart@intel.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20181125185003.688010903@linutronix.de
CVE-2017-5715

(cherry picked from commit 24848509aa55eac39d524b587b051f4e86df3c12)
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Acked-by: Juerg Haefliger <juergh@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index 8cc4cf9f1c2719b61ba08bc2d72648e226aaf3ff..d865d8dbbd9d8cea647f3027788fac7a04392489 100644 (file)
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -275,22 +275,21 @@ static enum spectre_v2_mitigation_cmd __init spectre_v2_parse_cmdline(void)
 
        if (cmdline_find_option_bool(boot_command_line, "nospectre_v2"))
                return SPECTRE_V2_CMD_NONE;
-       else {
-               ret = cmdline_find_option(boot_command_line, "spectre_v2", arg, sizeof(arg));
-               if (ret < 0)
-                       return SPECTRE_V2_CMD_AUTO;
 
-               for (i = 0; i < ARRAY_SIZE(mitigation_options); i++) {
-                       if (!match_option(arg, ret, mitigation_options[i].option))
-                               continue;
-                       cmd = mitigation_options[i].cmd;
-                       break;
-               }
+       ret = cmdline_find_option(boot_command_line, "spectre_v2", arg, sizeof(arg));
+       if (ret < 0)
+               return SPECTRE_V2_CMD_AUTO;
 
-               if (i >= ARRAY_SIZE(mitigation_options)) {
-                       pr_err("unknown option (%s). Switching to AUTO select\n", arg);
-                       return SPECTRE_V2_CMD_AUTO;
-               }
+       for (i = 0; i < ARRAY_SIZE(mitigation_options); i++) {
+               if (!match_option(arg, ret, mitigation_options[i].option))
+                       continue;
+               cmd = mitigation_options[i].cmd;
+               break;
+       }
+
+       if (i >= ARRAY_SIZE(mitigation_options)) {
+               pr_err("unknown option (%s). Switching to AUTO select\n", arg);
+               return SPECTRE_V2_CMD_AUTO;
        }
 
        if ((cmd == SPECTRE_V2_CMD_RETPOLINE ||