1From 03a886252f6555d6b0af76b654e76459642b89da Mon Sep 17 00:00:00 2001
2From: Yunguo Wei <yunguo.wei@windriver.com>
3Date: Tue, 3 Dec 2013 18:12:50 +0800
4Subject: [PATCH] pmtools: switch to dynamic buffer for huge ACPI tables
5
6For servers like Canoe Pass or Thunder Ridge, there are much more
7entries in ACPI table, so original 1K buffer is insufficient.
8
9We switch to dynamic buffer on this situation.
10
11Signed-off-by: Yunguo Wei <yunguo.wei@windriver.com>
12
13
14Upstream-Status: Pending
15
16Signed-off-by: Kai Kang <kai.kang@windriver.com>
17---
18 madt/madt.c | 18 +++++++++++++++++-
19 1 file changed, 17 insertions(+), 1 deletion(-)
20
21diff --git a/madt/madt.c b/madt/madt.c
22index aed965c..8770cd5 100644
23--- a/madt/madt.c
24+++ b/madt/madt.c
25@@ -51,7 +51,9 @@ get_next_entry(acpi_table_entry_header * entry_header)
26 	return retval;
27 }
28
29-u8	buffer[1024];
30+
31+u8	buf[1024];
32+u8	*buffer = buf;
33
34 main()
35 {
36@@ -75,6 +77,17 @@ main()
37
38 	if (verbose) printf("header.length %d\n", madt_header->header.length);
39
40+	/* if 1K buffer is insufficient for acpi table, switch to a larger memory buffer */
41+	if(expected_length > sizeof(buf)) {
42+		buffer = malloc(expected_length);
43+		if (!buffer) {
44+			perror("malloc");
45+			exit(1);
46+		}
47+		memset(buffer, 0, expected_length);
48+		memcpy(buffer, buf, sizeof(struct acpi_table_madt));
49+	}
50+
51 	acpi_table_print((void*)&(buffer[bytes_read]), 0);
52
53 	bytes_read = sizeof(struct acpi_table_madt);
54@@ -118,6 +131,9 @@ done:
55 		printf("Checksum 0x%x != 0; 0x%x in header ERROR\n", csum,
56 			 madt_header->header.checksum);
57
58+	if(buffer != buf)
59+		free(buffer);
60+
61 	return 0;
62 }
63
64--
651.8.1.2
66
67