target/linux/brcm2708/patches-4.19/950-0238-staging-vchiq_arm-Improve-error-handling-on-loading-.patch

   1 From 73979b06255c3b7b536a53d09ea095aec8ed37aa Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.org>
   3 Date: Mon, 3 Dec 2018 12:50:38 +0000
   4 Subject: [PATCH 238/806] staging: vchiq_arm: Improve error handling on loading
   5  drivers
   6
   7 The handling of loading platform drivers requires checking IS_ERR
   8 for the pointer on unload.
   9 If the driver fails to load, NULL the pointer during probe as
  10 platform_device_unregister already checks for NULL.
  11
  12 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
  13 ---
  14  .../vc04_services/interface/vchiq_arm/vchiq_arm.c    | 12 ++++++++----
  15  1 file changed, 8 insertions(+), 4 deletions(-)
  16
  17 --- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
  18 +++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
  19 @@ -3655,7 +3655,11 @@ static int vchiq_probe(struct platform_d
  20                 MAJOR(vchiq_devid), MINOR(vchiq_devid));
  21
  22         bcm2835_camera = vchiq_register_child(pdev, "bcm2835-camera");
  23 +       if (IS_ERR(bcm2835_camera))
  24 +               bcm2835_camera = NULL;
  25         bcm2835_audio = vchiq_register_child(pdev, "bcm2835_audio");
  26 +       if (IS_ERR(bcm2835_audio))
  27 +               bcm2835_audio = NULL;
  28
  29         return 0;
  30
  31 @@ -3672,10 +3676,10 @@ failed_platform_init:
  32
  33  static int vchiq_remove(struct platform_device *pdev)
  34  {
  35 -       if (!IS_ERR(bcm2835_audio))
  36 -               platform_device_unregister(bcm2835_audio);
  37 -       if (!IS_ERR(bcm2835_camera))
  38 -               platform_device_unregister(bcm2835_camera);
  39 +       platform_device_unregister(bcm2835_codec);
  40 +       platform_device_unregister(bcm2835_audio);
  41 +       platform_device_unregister(bcm2835_camera);
  42 +       platform_device_unregister(vcsm_cma);
  43         vchiq_debugfs_deinit();
  44         device_destroy(vchiq_class, vchiq_devid);
  45         class_destroy(vchiq_class);