media: ipu3-cio2: Fix reference counting when looping over ACPI devices

[ Upstream commit 2cb2705cf7ffe41dc5bd81290e4241bfb7f031cc ]

When we continue, due to device is disabled, loop we have to drop
reference count. When we have an array full of devices we have to also
drop the reference count. Note, in this case the
cio2_bridge_unregister_sensors() is called by the caller.

Fixes: 803abec64ef9 ("media: ipu3-cio2: Add cio2-bridge to ipu3-cio2 driver")
Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Daniel Scally <djrscally@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/media/pci/intel/ipu3/cio2-bridge.c b/drivers/media/pci/intel/ipu3/cio2-bridge.c
index c2199042d3db593b8d4f6bf045b791cfb6055f28..85f8b587405e081e82dbf6c66ef8fe56ce6f5ccc 100644 (file)
--- a/drivers/media/pci/intel/ipu3/cio2-bridge.c
+++ b/drivers/media/pci/intel/ipu3/cio2-bridge.c
@@ -173,14 +173,15 @@ static int cio2_bridge_connect_sensor(const struct cio2_sensor_config *cfg,
        int ret;
 
        for_each_acpi_dev_match(adev, cfg->hid, NULL, -1) {
-               if (!adev->status.enabled)
+               if (!adev->status.enabled) {
+                       acpi_dev_put(adev);
                        continue;
+               }
 
                if (bridge->n_sensors >= CIO2_NUM_PORTS) {
+                       acpi_dev_put(adev);
                        dev_err(&cio2->dev, "Exceeded available CIO2 ports\n");
-                       cio2_bridge_unregister_sensors(bridge);
-                       ret = -EINVAL;
-                       goto err_out;
+                       return -EINVAL;
                }
 
                sensor = &bridge->sensors[bridge->n_sensors];
@@ -228,7 +229,6 @@ err_free_swnodes:
        software_node_unregister_nodes(sensor->swnodes);
 err_put_adev:
        acpi_dev_put(sensor->adev);
-err_out:
        return ret;
 }