[tip: efi/core] efi/dev-path-parser: Switch to use for_each_acpi_dev_match()

[tip: efi/core] efi/dev-path-parser: Switch to use for_each_acpi_dev_match()

[tip-bot2 for Andy Shevchenko]

The following commit has been merged into the efi/core branch of tip:

Commit-ID:     edbd1bc4951eff8da65732dbe0d381e555054428
Gitweb:        https://git.kernel.org/tip/edbd1bc4951eff8da65732dbe0d381e555054428
Author:        Andy Shevchenko <andy.shevchenko@gmail.com>
AuthorDate:    Sun, 04 Apr 2021 21:12:16 +03:00
Committer:     Ard Biesheuvel <ardb@kernel.org>
CommitterDate: Sat, 22 May 2021 14:07:00 +02:00

efi/dev-path-parser: Switch to use for_each_acpi_dev_match()

Switch to use for_each_acpi_dev_match() instead of home grown analogue.
No functional change intended.

Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 drivers/firmware/efi/dev-path-parser.c | 49 +++++++++----------------
 1 file changed, 18 insertions(+), 31 deletions(-)

diff --git a/drivers/firmware/efi/dev-path-parser.c b/drivers/firmware/efi/dev-path-parser.c
index 5c9625e..10d4457 100644
--- a/drivers/firmware/efi/dev-path-parser.c
+++ b/drivers/firmware/efi/dev-path-parser.c
@@ -12,52 +12,39 @@
 #include <linux/efi.h>
 #include <linux/pci.h>
 
-struct acpi_hid_uid {
-	struct acpi_device_id hid[2];
-	char uid[11]; /* UINT_MAX + null byte */
-};
-
-static int __init match_acpi_dev(struct device *dev, const void *data)
-{
-	struct acpi_hid_uid hid_uid = *(const struct acpi_hid_uid *)data;
-	struct acpi_device *adev = to_acpi_device(dev);
-
-	if (acpi_match_device_ids(adev, hid_uid.hid))
-		return 0;
-
-	if (adev->pnp.unique_id)
-		return !strcmp(adev->pnp.unique_id, hid_uid.uid);
-	else
-		return !strcmp("0", hid_uid.uid);
-}
-
 static long __init parse_acpi_path(const struct efi_dev_path *node,
 				   struct device *parent, struct device **child)
 {
-	struct acpi_hid_uid hid_uid = {};
+	char hid[ACPI_ID_LEN], uid[11]; /* UINT_MAX + null byte */
+	struct acpi_device *adev;
 	struct device *phys_dev;
 
 	if (node->header.length != 12)
 		return -EINVAL;
 
-	sprintf(hid_uid.hid[0].id, "%c%c%c%04X",
+	sprintf(hid, "%c%c%c%04X",
 		'A' + ((node->acpi.hid >> 10) & 0x1f) - 1,
 		'A' + ((node->acpi.hid >>  5) & 0x1f) - 1,
 		'A' + ((node->acpi.hid >>  0) & 0x1f) - 1,
 			node->acpi.hid >> 16);
-	sprintf(hid_uid.uid, "%u", node->acpi.uid);
-
-	*child = bus_find_device(&acpi_bus_type, NULL, &hid_uid,
-				 match_acpi_dev);
-	if (!*child)
+	sprintf(uid, "%u", node->acpi.uid);
+
+	for_each_acpi_dev_match(adev, hid, NULL, -1) {
+		if (adev->pnp.unique_id && !strcmp(adev->pnp.unique_id, uid))
+			break;
+		if (!adev->pnp.unique_id && node->acpi.uid == 0)
+			break;
+		acpi_dev_put(adev);
+	}
+	if (!adev)
 		return -ENODEV;
 
-	phys_dev = acpi_get_first_physical_node(to_acpi_device(*child));
+	phys_dev = acpi_get_first_physical_node(adev);
 	if (phys_dev) {
-		get_device(phys_dev);
-		put_device(*child);
-		*child = phys_dev;
-	}
+		*child = get_device(phys_dev);
+		acpi_dev_put(adev);
+	} else
+		*child = &adev->dev;
 
 	return 0;
 }