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[v7,12/15] acpi, numa, srat: Improve SRAT error detection and add messages.

Message ID 1464129345-18985-13-git-send-email-ddaney.cavm@gmail.com (mailing list archive)
State Accepted, archived
Delegated to: Rafael Wysocki
Headers show

Commit Message

David Daney May 24, 2016, 10:35 p.m. UTC 
From: David Daney <david.daney@cavium.com>

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@cavium.com>
---
 drivers/acpi/numa.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)
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Patch

diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c
index 811f90a..fad6d28 100644
--- a/drivers/acpi/numa.c
+++ b/drivers/acpi/numa.c
@@ -252,8 +252,11 @@  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;
@@ -267,13 +270,17 @@  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);