tpm: do not ignore memblock_reserve return value

JIRA: https://issues.redhat.com/browse/RHEL-72764

Upstream Status: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

commit c33c28f
Author: Gregory Price <gourry@gourry.net>
Date:   Fri Sep 13 19:19:52 2024 -0400

    tpm: do not ignore memblock_reserve return value

    tpm code currently ignores a relevant failure case silently.
    Add an error to make this failure non-silent.

    Signed-off-by: Gregory Price <gourry@gourry.net>
    Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

Signed-off-by: Štěpán Horáček <shoracek@redhat.com>

Author: shoracek

drivers/firmware/efi/tpm.c

@@ -61,7 +61,12 @@ int __init efi_tpm_eventlog_init(void)
 	}
 
 	tbl_size = sizeof(*log_tbl) + log_tbl->size;
-	memblock_reserve(efi.tpm_log, tbl_size);
+	if (memblock_reserve(efi.tpm_log, tbl_size)) {
+		pr_err("TPM Event Log memblock reserve fails (0x%lx, 0x%x)\n",
+		       efi.tpm_log, tbl_size);
+		ret = -ENOMEM;
+		goto out;
+	}
 
 	if (efi.tpm_final_log == EFI_INVALID_TABLE_ADDR) {
 		pr_info("TPM Final Events table not present\n");