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hc

2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/drivers/firmware/efi/esrt.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0+
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 /*
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  * esrt.c
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  *
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@@ -239,11 +240,13 @@
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 {
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 	void *va;
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 	struct efi_system_resource_table tmpesrt;
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-	struct efi_system_resource_entry_v1 *v1_entries;
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 	size_t size, max, entry_size, entries_size;
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 	efi_memory_desc_t md;
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 	int rc;
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 	phys_addr_t end;
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+
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+	if (!efi_enabled(EFI_MEMMAP))
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+		return;
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 	pr_debug("esrt-init: loading.\n");
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 	if (!esrt_table_exists())
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@@ -284,14 +287,13 @@
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 	memcpy(&tmpesrt, va, sizeof(tmpesrt));
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 	early_memunmap(va, size);
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-	if (tmpesrt.fw_resource_version == 1) {
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-		entry_size = sizeof (*v1_entries);
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-	} else {
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+	if (tmpesrt.fw_resource_version != 1) {
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 		pr_err("Unsupported ESRT version %lld.\n",
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 		       tmpesrt.fw_resource_version);
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 		return;
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 	}
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+	entry_size = sizeof(struct efi_system_resource_entry_v1);
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 	if (tmpesrt.fw_resource_count > 0 && max - size < entry_size) {
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 		pr_err("ESRT memory map entry can only hold the header. (max: %zu size: %zu)\n",
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 		       max - size, entry_size);