Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Cross-merge networking fixes after downstream PR.

No conflicts (or adjacent changes of note).

Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 29 insertions, 3 deletions

diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 1599f1176842..ce20a60676f0 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -623,6 +623,34 @@ static __init int match_config_table(const efi_guid_t *guid,
 	return 0;
 }
 
+/**
+ * reserve_unaccepted - Map and reserve unaccepted configuration table
+ * @unaccepted: Pointer to unaccepted memory table
+ *
+ * memblock_add() makes sure that the table is mapped in direct mapping. During
+ * normal boot it happens automatically because the table is allocated from
+ * usable memory. But during crashkernel boot only memory specifically reserved
+ * for crash scenario is mapped. memblock_add() forces the table to be mapped
+ * in crashkernel case.
+ *
+ * Align the range to the nearest page borders. Ranges smaller than page size
+ * are not going to be mapped.
+ *
+ * memblock_reserve() makes sure that future allocations will not touch the
+ * table.
+ */
+
+static __init void reserve_unaccepted(struct efi_unaccepted_memory *unaccepted)
+{
+	phys_addr_t start, size;
+
+	start = PAGE_ALIGN_DOWN(efi.unaccepted);
+	size = PAGE_ALIGN(sizeof(*unaccepted) + unaccepted->size);
+
+	memblock_add(start, size);
+	memblock_reserve(start, size);
+}
+
 int __init efi_config_parse_tables(const efi_config_table_t *config_tables,
 				   int count,
 				   const efi_config_table_type_t *arch_tables)
@@ -751,11 +779,9 @@ int __init efi_config_parse_tables(const efi_config_table_t *config_tables,
 
 		unaccepted = early_memremap(efi.unaccepted, sizeof(*unaccepted));
 		if (unaccepted) {
-			unsigned long size;
 
 			if (unaccepted->version == 1) {
-				size = sizeof(*unaccepted) + unaccepted->size;
-				memblock_reserve(efi.unaccepted, size);
+				reserve_unaccepted(unaccepted);
 			} else {
 				efi.unaccepted = EFI_INVALID_TABLE_ADDR;
 			}