[PATCH v4 11/14] acpi, numa, srat: Improve SRAT error detection and add messages.

[David Daney]

From: David Daney <david.daney@xxxxxxxxxx>

Loosely based on code from Robert Richter and Hanjun Guo.

Improve out of range node detection as well as allow for Larger SRAT
entities.

Add printing of nice messages.

Signed-off-by: David Daney <david.daney@xxxxxxxxxx>
---
 drivers/acpi/numa.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c
index c4ea877..6133eb1 100644
--- a/drivers/acpi/numa.c
+++ b/drivers/acpi/numa.c
@@ -240,8 +240,11 @@ acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
 
 	if (srat_disabled())
 		goto out_err;
-	if (ma->header.length != sizeof(struct acpi_srat_mem_affinity))
+	if (ma->header.length < sizeof(struct acpi_srat_mem_affinity)) {
+		pr_err("SRAT: Unexpected header length: %d\n",
+		       ma->header.length);
 		goto out_err_bad_srat;
+	}
 	if ((ma->flags & ACPI_SRAT_MEM_ENABLED) == 0)
 		goto out_err;
 	hotpluggable = ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE;
@@ -255,13 +258,17 @@ acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
 		pxm &= 0xff;
 
 	node = acpi_map_pxm_to_node(pxm);
-	if (node < 0) {
-		printk(KERN_ERR "SRAT: Too many proximity domains.\n");
+	if (node == NUMA_NO_NODE || node >= MAX_NUMNODES) {
+		pr_err("SRAT: Too many proximity domains.\n");
 		goto out_err_bad_srat;
 	}
 
-	if (numa_add_memblk(node, start, end) < 0)
+	if (numa_add_memblk(node, start, end) < 0) {
+		pr_err("SRAT: Failed to add memblk to node %u [mem %#010Lx-%#010Lx]\n",
+		       node, (unsigned long long) start,
+		       (unsigned long long) end - 1);
 		goto out_err_bad_srat;
+	}
 
 	node_set(node, numa_nodes_parsed);
 
-- 
1.7.11.7