linux-kernel - [PATCH v1 06/10] device property: switch to use UUID API

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Date:	Wed, 17 Feb 2016 14:17:24 +0200
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	"Theodore Ts'o" <tytso@....edu>, Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
	Jani Nikula <jani.nikula@...ux.intel.com>,
	David Airlie <airlied@...ux.ie>,
	Benjamin Tissoires <benjamin.tissoires@...hat.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Mathias Nyman <mathias.nyman@...el.com>,
	Matt Fleming <matt@...eblueprint.co.uk>,
	Lv Zheng <lv.zheng@...el.com>, Mark Brown <broonie@...nel.org>,
	Zhang Rui <rui.zhang@...el.com>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rasmus Villemoes <linux@...musvillemoes.dk>,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	dri-devel@...ts.freedesktop.org, linux-efi@...r.kernel.org,
	linux-api@...r.kernel.org, linux-nvdimm@...ts.01.org
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1 06/10] device property: switch to use UUID API

Switch to use a generic UUID API instead of custom approach. It allows to
define UUIDs, compare them, and validate.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/acpi/property.c | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c
index 2aee416..1e75305 100644
--- a/drivers/acpi/property.c
+++ b/drivers/acpi/property.c
@@ -25,15 +25,13 @@ static int acpi_data_get_property_array(struct acpi_device_data *data,
 					const union acpi_object **obj);
 
 /* ACPI _DSD device properties UUID: daffd814-6eba-4d8c-8a91-bc9bbf4aa301 */
-static const u8 prp_uuid[16] = {
-	0x14, 0xd8, 0xff, 0xda, 0xba, 0x6e, 0x8c, 0x4d,
-	0x8a, 0x91, 0xbc, 0x9b, 0xbf, 0x4a, 0xa3, 0x01
-};
+static const uuid_le prp_uuid =
+	UUID_LE(0xdaffd814, 0x6eba, 0x4d8c,
+		0x8a, 0x91, 0xbc, 0x9b, 0xbf, 0x4a, 0xa3, 0x01);
 /* ACPI _DSD data subnodes UUID: dbb8e3e6-5886-4ba6-8795-1319f52a966b */
-static const u8 ads_uuid[16] = {
-	0xe6, 0xe3, 0xb8, 0xdb, 0x86, 0x58, 0xa6, 0x4b,
-	0x87, 0x95, 0x13, 0x19, 0xf5, 0x2a, 0x96, 0x6b
-};
+static const uuid_le ads_uuid =
+	UUID_LE(0xdbb8e3e6, 0x5886, 0x4ba6,
+		0x87, 0x95, 0x13, 0x19, 0xf5, 0x2a, 0x96, 0x6b);
 
 static bool acpi_enumerate_nondev_subnodes(acpi_handle scope,
 					   const union acpi_object *desc,
@@ -138,7 +136,7 @@ static bool acpi_enumerate_nondev_subnodes(acpi_handle scope,
 		    || links->type != ACPI_TYPE_PACKAGE)
 			break;
 
-		if (memcmp(uuid->buffer.pointer, ads_uuid, sizeof(ads_uuid)))
+		if (uuid_le_cmp(*(uuid_le *)uuid->buffer.pointer, ads_uuid))
 			continue;
 
 		return acpi_add_nondev_subnodes(scope, links, &data->subnodes);
@@ -245,7 +243,7 @@ static bool acpi_extract_properties(const union acpi_object *desc,
 		    || properties->type != ACPI_TYPE_PACKAGE)
 			break;
 
-		if (memcmp(uuid->buffer.pointer, prp_uuid, sizeof(prp_uuid)))
+		if (uuid_le_cmp(*(uuid_le *)uuid->buffer.pointer, prp_uuid))
 			continue;
 
 		/*
-- 
2.7.0