[PATCH 3/5] x86/acpi: simplify updating header checksum

[Heinrich Schuchardt]

Use acpi_update_checksum() for updating ACPI table header checksum.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
---
 arch/x86/cpu/apollolake/hostbridge.c |  2 +-
 arch/x86/lib/acpi_nhlt.c             |  2 +-
 arch/x86/lib/acpi_table.c            | 11 ++++-------
 3 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/arch/x86/cpu/apollolake/hostbridge.c b/arch/x86/cpu/apollolake/hostbridge.c
index 039236df02d..284f16cfd91 100644
--- a/arch/x86/cpu/apollolake/hostbridge.c
+++ b/arch/x86/cpu/apollolake/hostbridge.c
@@ -298,7 +298,7 @@ static int apl_acpi_hb_write_tables(const struct udevice *dev,
 
 	/* (Re)calculate length and checksum */
 	header->length = ctx->current - (void *)dmar;
-	header->checksum = table_compute_checksum((void *)dmar, header->length);
+	acpi_update_checksum(header);
 
 	acpi_align(ctx);
 	acpi_add_table(ctx, dmar);
diff --git a/arch/x86/lib/acpi_nhlt.c b/arch/x86/lib/acpi_nhlt.c
index 880ef31df7d..8aae5fa5af7 100644
--- a/arch/x86/lib/acpi_nhlt.c
+++ b/arch/x86/lib/acpi_nhlt.c
@@ -414,7 +414,7 @@ int nhlt_serialise_oem_overrides(struct acpi_ctx *ctx, struct nhlt *nhlt,
 	cur.start = (void *)header;
 	nhlt_serialise_endpoints(nhlt, &cur);
 
-	header->checksum = table_compute_checksum(header, sz);
+	acpi_update_checksum(header);
 	nhlt_free_resources(nhlt);
 	assert(cur.buf - cur.start == sz);
 
diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c
index 3186e48d63b..b13292c4150 100644
--- a/arch/x86/lib/acpi_table.c
+++ b/arch/x86/lib/acpi_table.c
@@ -173,7 +173,7 @@ int acpi_write_tcpa(struct acpi_ctx *ctx, const struct acpi_writer *entry)
 	/* (Re)calculate length and checksum */
 	current = (u32)tcpa + sizeof(struct acpi_tcpa);
 	header->length = current - (u32)tcpa;
-	header->checksum = table_compute_checksum(tcpa, header->length);
+	acpi_update_checksum(header);
 
 	acpi_inc(ctx, tcpa->header.length);
 	acpi_add_table(ctx, tcpa);
@@ -242,7 +242,7 @@ static int acpi_write_tpm2(struct acpi_ctx *ctx,
 	tpm2->lasa = nomap_to_sysmem(lasa);
 
 	/* Calculate checksum. */
-	header->checksum = table_compute_checksum(tpm2, header->length);
+	acpi_update_checksum(header);
 
 	acpi_inc(ctx, tpm2->header.length);
 	acpi_add_table(ctx, tpm2);
@@ -279,9 +279,7 @@ int acpi_write_gnvs(struct acpi_ctx *ctx, const struct acpi_writer *entry)
 		 * patched the GNVS address. Set the checksum to zero since it
 		 * is part of the region being checksummed.
 		 */
-		ctx->dsdt->checksum = 0;
-		ctx->dsdt->checksum = table_compute_checksum((void *)ctx->dsdt,
-							     ctx->dsdt->length);
+		acpi_update_checksum(ctx->dsdt);
 	}
 
 	/* Fill in platform-specific global NVS variables */
@@ -330,8 +328,7 @@ static int acpi_create_hpet(struct acpi_hpet *hpet)
 	hpet->number = 0;
 	hpet->min_tick = 0; /* HPET_MIN_TICKS */
 
-	header->checksum = table_compute_checksum(hpet,
-						  sizeof(struct acpi_hpet));
+	acpi_update_checksum(header);
 
 	return 0;
 }
-- 
2.48.1