x86/microcode/AMD: Return bool from find_blobs_in_containers()

commit a85c08a upstream.

Instead of open-coding the check for size/data move it inside the
function and make it return a boolean indicating whether data was found
or not.

No functional changes.

  [ bp: Write @ret in find_blobs_in_containers() only on success. ]

Signed-off-by: Nikolay Borisov <nik.borisov@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20241018155151.702350-2-nik.borisov@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Nikolay Borisov

arch/x86/kernel/cpu/microcode/amd.c

@@ -569,14 +569,19 @@ static bool get_builtin_microcode(struct cpio_data *cp)
 	return false;
 }
 
-static void __init find_blobs_in_containers(struct cpio_data *ret)
+static bool __init find_blobs_in_containers(struct cpio_data *ret)
 {
 	struct cpio_data cp;
+	bool found;
 
 	if (!get_builtin_microcode(&cp))
 		cp = find_microcode_in_initrd(ucode_path);
 
-	*ret = cp;
+	found = cp.data && cp.size;
+	if (found)
+		*ret = cp;
+
+	return found;
 }
 
 void __init load_ucode_amd_bsp(struct early_load_data *ed, unsigned int cpuid_1_eax)
@@ -591,8 +596,7 @@ void __init load_ucode_amd_bsp(struct early_load_data *ed, unsigned int cpuid_1_
 	/* Needed in load_microcode_amd() */
 	ucode_cpu_info[0].cpu_sig.sig = cpuid_1_eax;
 
-	find_blobs_in_containers(&cp);
-	if (!(cp.data && cp.size))
+	if (!find_blobs_in_containers(&cp))
 		return;
 
 	if (early_apply_microcode(ed->old_rev, cp.data, cp.size))
@@ -612,8 +616,7 @@ static int __init save_microcode_in_initrd(void)
 	if (dis_ucode_ldr || c->x86_vendor != X86_VENDOR_AMD || c->x86 < 0x10)
 		return 0;
 
-	find_blobs_in_containers(&cp);
-	if (!(cp.data && cp.size))
+	if (!find_blobs_in_containers(&cp))
 		return -EINVAL;
 
 	scan_containers(cp.data, cp.size, &desc);