[PATCH 3/5] x86/ucode: Don't try to cope with NULL pointers in apply_microcode()

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

No paths to apply_microcode() pass a NULL pointer, and other hooks don't
tolerate one in the first place.  We can expect the core logic not to pass us
junk, so drop the checks.

Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Jan Beulich <JBeulich@xxxxxxxx>
CC: Wei Liu <wl@xxxxxxx>
CC: Roger Pau Monné <roger.pau@xxxxxxxxxx>
---
 xen/arch/x86/cpu/microcode/amd.c   | 3 ---
 xen/arch/x86/cpu/microcode/intel.c | 3 ---
 2 files changed, 6 deletions(-)

diff --git a/xen/arch/x86/cpu/microcode/amd.c b/xen/arch/x86/cpu/microcode/amd.c
index c9656de55d..0ca0e9a038 100644
--- a/xen/arch/x86/cpu/microcode/amd.c
+++ b/xen/arch/x86/cpu/microcode/amd.c
@@ -219,9 +219,6 @@ static int apply_microcode(const struct microcode_patch 
*patch)
     struct cpu_signature *sig = &per_cpu(cpu_sig, cpu);
     uint32_t rev, old_rev = sig->rev;
 
-    if ( !patch )
-        return -ENOENT;
-
     if ( microcode_fits(patch) != NEW_UCODE )
         return -EINVAL;
 
diff --git a/xen/arch/x86/cpu/microcode/intel.c 
b/xen/arch/x86/cpu/microcode/intel.c
index 315fca9ff2..9cb077b583 100644
--- a/xen/arch/x86/cpu/microcode/intel.c
+++ b/xen/arch/x86/cpu/microcode/intel.c
@@ -270,9 +270,6 @@ static int apply_microcode(const struct microcode_patch 
*patch)
     struct cpu_signature *sig = &this_cpu(cpu_sig);
     uint32_t rev, old_rev = sig->rev;
 
-    if ( !patch )
-        return -ENOENT;
-
     if ( microcode_update_match(patch) != NEW_UCODE )
         return -EINVAL;
 
-- 
2.11.0