x86/microcode/intel: Make _save_mc() return the updated saved count

... of microcode patches instead of handing in a pointer which is used
for I/O in an otherwise void function.

Signed-off-by: Borislav Petkov <bp@suse.de>

diff --git a/arch/x86/kernel/cpu/microcode/intel_early.c b/arch/x86/kernel/cpu/microcode/intel_early.c
index 34a2ff9..f1d9a32 100644 (file)
--- a/arch/x86/kernel/cpu/microcode/intel_early.c
+++ b/arch/x86/kernel/cpu/microcode/intel_early.c
@@ -262,17 +262,18 @@ err:
  * - or if it is a newly discovered microcode patch.
  *
  * The microcode patch should have matching model with CPU.
+ *
+ * Returns: The updated number @num_saved of saved microcode patches.
  */
-static void _save_mc(struct microcode_intel **mc_saved, u8 *ucode_ptr,
-                    unsigned int *mc_saved_count_p)
+static unsigned int _save_mc(struct microcode_intel **mc_saved,
+                            u8 *ucode_ptr, unsigned int num_saved)
 {
-       int i;
-       int found = 0;
-       unsigned int mc_saved_count = *mc_saved_count_p;
        struct microcode_header_intel *mc_header;
+       int found = 0, i;
 
        mc_header = (struct microcode_header_intel *)ucode_ptr;
-       for (i = 0; i < mc_saved_count; i++) {
+
+       for (i = 0; i < num_saved; i++) {
                unsigned int sig, pf;
                unsigned int new_rev;
                struct microcode_header_intel *mc_saved_header =
@@ -289,21 +290,20 @@ static void _save_mc(struct microcode_intel **mc_saved, u8 *ucode_ptr,
                                 * Replace the older one with this newer
                                 * one.
                                 */
-                               mc_saved[i] =
-                                       (struct microcode_intel *)ucode_ptr;
+                               mc_saved[i] = (struct microcode_intel *)ucode_ptr;
                                break;
                        }
                }
        }
-       if (i >= mc_saved_count && !found)
+
+       if (i >= num_saved && !found)
                /*
                 * This ucode is first time discovered in ucode file.
                 * Save it to memory.
                 */
-               mc_saved[mc_saved_count++] =
-                                (struct microcode_intel *)ucode_ptr;
+               mc_saved[num_saved++] = (struct microcode_intel *)ucode_ptr;
 
-       *mc_saved_count_p = mc_saved_count;
+       return num_saved;
 }
 
 /*
@@ -351,7 +351,7 @@ get_matching_model_microcode(int cpu, unsigned long start,
                        continue;
                }
 
-               _save_mc(mc_saved_tmp, ucode_ptr, &mc_saved_count);
+               mc_saved_count = _save_mc(mc_saved_tmp, ucode_ptr, mc_saved_count);
 
                ucode_ptr += mc_size;
        }
@@ -519,8 +519,7 @@ int save_mc_for_early(u8 *mc)
         * Save the microcode patch mc in mc_save_tmp structure if it's a newer
         * version.
         */
-
-       _save_mc(mc_saved_tmp, mc, &mc_saved_count);
+       mc_saved_count = _save_mc(mc_saved_tmp, mc, mc_saved_count);
 
        /*
         * Save the mc_save_tmp in global mc_saved_data.