linux-kernel - [PATCH v1 1/2] HID: i2c-hid: acpi: Drop unneded NULL check of adev

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Date:   Tue, 22 Nov 2022 21:18:20 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>
Subject: [PATCH v1 1/2] HID: i2c-hid: acpi: Drop unneded NULL check of adev

The driver is enumerated on ACPI platforms, so adev is valid.
Since there is no valid I²C ID table provided, there is no
possibility to bind a device to this driver via user space.
Hence, drop unneeded NULL check of adev.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/hid/i2c-hid/i2c-hid-acpi.c | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/drivers/hid/i2c-hid/i2c-hid-acpi.c b/drivers/hid/i2c-hid/i2c-hid-acpi.c
index b96ae15e0ad9..661a87dbd584 100644
--- a/drivers/hid/i2c-hid/i2c-hid-acpi.c
+++ b/drivers/hid/i2c-hid/i2c-hid-acpi.c
@@ -48,8 +48,9 @@ static guid_t i2c_hid_guid =
 	GUID_INIT(0x3CDFF6F7, 0x4267, 0x4555,
 		  0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE);
 
-static int i2c_hid_acpi_get_descriptor(struct acpi_device *adev)
+static int i2c_hid_acpi_get_descriptor(struct i2c_hid_acpi *ihid_acpi)
 {
+	struct acpi_device *adev = ihid_acpi->adev;
 	acpi_handle handle = acpi_device_handle(adev);
 	union acpi_object *obj;
 	u16 hid_descriptor_address;
@@ -81,29 +82,22 @@ static int i2c_hid_acpi_probe(struct i2c_client *client)
 {
 	struct device *dev = &client->dev;
 	struct i2c_hid_acpi *ihid_acpi;
-	struct acpi_device *adev;
 	u16 hid_descriptor_address;
 	int ret;
 
-	adev = ACPI_COMPANION(dev);
-	if (!adev) {
-		dev_err(&client->dev, "Error could not get ACPI device\n");
-		return -ENODEV;
-	}
-
 	ihid_acpi = devm_kzalloc(&client->dev, sizeof(*ihid_acpi), GFP_KERNEL);
 	if (!ihid_acpi)
 		return -ENOMEM;
 
-	ihid_acpi->adev = adev;
+	ihid_acpi->adev = ACPI_COMPANION(dev);
 	ihid_acpi->ops.shutdown_tail = i2c_hid_acpi_shutdown_tail;
 
-	ret = i2c_hid_acpi_get_descriptor(adev);
+	ret = i2c_hid_acpi_get_descriptor(ihid_acpi);
 	if (ret < 0)
 		return ret;
 	hid_descriptor_address = ret;
 
-	acpi_device_fix_up_power(adev);
+	acpi_device_fix_up_power(ihid_acpi->adev);
 
 	if (acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0) {
 		device_set_wakeup_capable(dev, true);
-- 
2.35.1