From: Simon Glass <sjg@chromium.org>
Date: Wed, 8 Jul 2020 03:32:24 +0000 (-0600)
Subject: x86: Add error checking for csrt table generation
X-Git-Url: http://git.dujemihanovic.xyz/login.html?a=commitdiff_plain;h=31b410a68c706a12b36773d025a649c23cdfdb72;p=u-boot.git

x86: Add error checking for csrt table generation

Generation of this table can fail, so update the function to return an
error code.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
---

diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c
index 8219376e17..d2bc3386eb 100644
--- a/arch/x86/lib/acpi_table.c
+++ b/arch/x86/lib/acpi_table.c
@@ -212,13 +212,14 @@ static void acpi_create_mcfg(struct acpi_mcfg *mcfg)
 
 __weak u32 acpi_fill_csrt(u32 current)
 {
-	return current;
+	return 0;
 }
 
-static void acpi_create_csrt(struct acpi_csrt *csrt)
+static int acpi_create_csrt(struct acpi_csrt *csrt)
 {
 	struct acpi_table_header *header = &(csrt->header);
 	u32 current = (u32)csrt + sizeof(struct acpi_csrt);
+	uint ptr;
 
 	memset((void *)csrt, 0, sizeof(struct acpi_csrt));
 
@@ -227,11 +228,16 @@ static void acpi_create_csrt(struct acpi_csrt *csrt)
 	header->length = sizeof(struct acpi_csrt);
 	header->revision = 0;
 
-	current = acpi_fill_csrt(current);
+	ptr = acpi_fill_csrt(current);
+	if (!ptr)
+		return -ENOENT;
+	current = ptr;
 
 	/* (Re)calculate length and checksum */
 	header->length = current - (u32)csrt;
 	header->checksum = table_compute_checksum((void *)csrt, header->length);
+
+	return 0;
 }
 
 static void acpi_create_spcr(struct acpi_spcr *spcr)
@@ -482,9 +488,10 @@ ulong write_acpi_tables(ulong start_addr)
 
 	debug("ACPI:    * CSRT\n");
 	csrt = ctx->current;
-	acpi_create_csrt(csrt);
-	acpi_inc_align(ctx, csrt->header.length);
-	acpi_add_table(ctx, csrt);
+	if (!acpi_create_csrt(csrt)) {
+		acpi_inc_align(ctx, csrt->header.length);
+		acpi_add_table(ctx, csrt);
+	}
 
 	debug("ACPI:    * SPCR\n");
 	spcr = ctx->current;