linux-kernel - [PATCH v1 3/7] i2c: i2c-amd-mp2-plat: ACPI: Use ACPI

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 12 Oct 2021 19:44:33 +0200
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Linux ACPI <linux-acpi@...r.kernel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Elie Morisse <syniurge@...il.com>,
        Nehal Shah <nehal-bakulchandra.shah@....com>,
        Shyam Sundar S K <shyam-sundar.s-k@....com>,
        linux-i2c@...r.kernel.org
Subject: [PATCH v1 3/7] i2c: i2c-amd-mp2-plat: ACPI: Use ACPI_COMPANION() directly

From: Rafael J. Wysocki <rafael@...nel.org>

The ACPI_HANDLE() macro is a wrapper arond the ACPI_COMPANION()
macro and the ACPI handle produced by the former comes from the
ACPI device object produced by the latter, so it is way more
straightforward to evaluate the latter directly instead of passing
the handle produced by the former to acpi_bus_get_device().

Modify i2c_amd_probe() accordingly (no intentional functional impact).

Signed-off-by: Rafael J. Wysocki <rafael@...nel.org>
---
 drivers/i2c/busses/i2c-amd-mp2-plat.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

Index: linux-pm/drivers/i2c/busses/i2c-amd-mp2-plat.c
===================================================================
--- linux-pm.orig/drivers/i2c/busses/i2c-amd-mp2-plat.c
+++ linux-pm/drivers/i2c/busses/i2c-amd-mp2-plat.c
@@ -246,12 +246,11 @@ static int i2c_amd_probe(struct platform
 {
 	int ret;
 	struct amd_i2c_dev *i2c_dev;
-	acpi_handle handle = ACPI_HANDLE(&pdev->dev);
-	struct acpi_device *adev;
+	struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
 	struct amd_mp2_dev *mp2_dev;
 	const char *uid;
 
-	if (acpi_bus_get_device(handle, &adev))
+	if (!adev)
 		return -ENODEV;
 
 	/* The ACPI namespace doesn't contain information about which MP2 PCI