[PATCH] ACPI / button: Add input_free_device() on registration failure

[Kaushlendra Kumar <kaushlendra.kumar@intel.com>]

Add input_free_device() call when input_register_device() fails to
prevent memory leak. According to input_register_device() documentation,
"If function fails the device must be freed with input_free_device()",
but the current code only jumps to err_remove_fs without freeing the
allocated input device.

This ensures proper cleanup of the input device structure when device
registration encounters an error, preventing resource leaks in the ACPI
button driver.

Signed-off-by: Kaushlendra Kumar <kaushlendra.kumar@intel.com>
---
 drivers/acpi/button.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c
index 0a7026040188..3c6dd9b4ba0a 100644
--- a/drivers/acpi/button.c
+++ b/drivers/acpi/button.c
@@ -619,8 +619,10 @@ static int acpi_button_add(struct acpi_device *device)
 
 	input_set_drvdata(input, device);
 	error = input_register_device(input);
-	if (error)
+	if (error) {
+		input_free_device(input);
 		goto err_remove_fs;
+	}
 
 	switch (device->device_type) {
 	case ACPI_BUS_TYPE_POWER_BUTTON:
-- 
2.34.1