target/linux/bcm27xx/patches-5.15/950-0616-staging-bcm2835-isp-Fix-cleanup-after-init-fail.patch

   1 From f5b1e0398dc2f3b80c62c06ad7bb39224cd07bf8 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.com>
   3 Date: Thu, 16 Dec 2021 16:25:00 +0000
   4 Subject: [PATCH] staging/bcm2835-isp: Fix cleanup after init fail
   5
   6 bcm2835_isp_remove is called on an initialisation failure, but at that
   7 point the drvdata hasn't been set. This causes a crash when e.g. using
   8 the cutdown firmware (gpu_mem=16).
   9
  10 Move platform_set_drvdata before the instance probing loop to avoid the
  11 problem.
  12
  13 See: https://github.com/raspberrypi/linux/issues/4774
  14
  15 Signed-off-by: Phil Elwell <phil@raspberrypi.com>
  16 ---
  17  drivers/staging/vc04_services/bcm2835-isp/bcm2835-v4l2-isp.c | 3 ++-
  18  1 file changed, 2 insertions(+), 1 deletion(-)
  19
  20 --- a/drivers/staging/vc04_services/bcm2835-isp/bcm2835-v4l2-isp.c
  21 +++ b/drivers/staging/vc04_services/bcm2835-isp/bcm2835-v4l2-isp.c
  22 @@ -1774,6 +1774,8 @@ static int bcm2835_isp_probe(struct plat
  23         if (!bcm2835_isp_instances)
  24                 return -ENOMEM;
  25
  26 +       platform_set_drvdata(pdev, bcm2835_isp_instances);
  27 +
  28         for (i = 0; i < BCM2835_ISP_NUM_INSTANCES; i++) {
  29                 ret = bcm2835_isp_probe_instance(pdev,
  30                                                  &bcm2835_isp_instances[i], i);
  31 @@ -1781,7 +1783,6 @@ static int bcm2835_isp_probe(struct plat
  32                         goto error;
  33         }
  34
  35 -       platform_set_drvdata(pdev, bcm2835_isp_instances);
  36         dev_info(&pdev->dev, "Loaded V4L2 %s\n", BCM2835_ISP_NAME);
  37         return 0;
  38