x86/microcode/AMD: Simplify saving from initrd

No need to use the previously stashed info in the container - simply go
ahead and parse the initrd once more. It simplifies and streamlines the
code a whole lot.

Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20170120202955.4091-15-bp@alien8.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 13 insertions, 30 deletions

diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c
index fe9e865480af..2a194e384207 100644
--- a/arch/x86/kernel/cpu/microcode/amd.c
+++ b/arch/x86/kernel/cpu/microcode/amd.c
@@ -372,43 +372,26 @@ load_microcode_amd(int cpu, u8 family, const u8 *data, size_t size);
 
 int __init save_microcode_in_initrd_amd(unsigned int cpuid_1_eax)
 {
+        struct cont_desc desc = { 0 };
         enum ucode_state ret;
-        int retval = 0;
-
-        if (!cont.data) {
-                if (IS_ENABLED(CONFIG_X86_32) && (cont.size != -1)) {
-                        struct cpio_data cp;
-
-                        cp = find_microcode_in_initrd(ucode_path, false);
-                        if (!(cp.data && cp.size)) {
-                                cont.size = -1;
-                                return -EINVAL;
-                        }
+        struct cpio_data cp;
 
-                        cont.cpuid_1_eax = cpuid_1_eax;
+        cp = find_microcode_in_initrd(ucode_path, false);
+        if (!(cp.data && cp.size))
+                return -EINVAL;
 
-                        scan_containers(cp.data, cp.size, &cont);
-                        if (!cont.eq_id) {
-                                cont.size = -1;
-                                return -EINVAL;
-                        }
+        desc.cpuid_1_eax = cpuid_1_eax;
 
-                } else
-                        return -EINVAL;
-        }
+        scan_containers(cp.data, cp.size, &desc);
+        if (!desc.eq_id)
+                return -EINVAL;
 
-        ret = load_microcode_amd(smp_processor_id(), x86_family(cpuid_1_eax), cont.data, cont.size);
+        ret = load_microcode_amd(smp_processor_id(), x86_family(cpuid_1_eax),
+                                 desc.data, desc.size);
         if (ret != UCODE_OK)
-                retval = -EINVAL;
-
-        /*
-         * This will be freed any msec now, stash patches for the current
-         * family and switch to patch cache for cpu hotplug, etc later.
-         */
-        cont.data = NULL;
-        cont.size = 0;
+                return -EINVAL;
 
-        return retval;
+        return 0;
 }
 
 void reload_ucode_amd(void)