target/linux/bcm27xx/patches-4.19/950-0317-staging-vc_sm_cma-Remove-erroneous-misc_deregister.patch

   1 From 7b2fac96ce48939e399707c4b8bd9905d6274a05 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.org>
   3 Date: Fri, 8 Mar 2019 10:38:59 +0000
   4 Subject: [PATCH] staging: vc_sm_cma: Remove erroneous misc_deregister
   5
   6 Code from the misc /dev node was still present in
   7 bcm2835_vc_sm_cma_remove, which caused a NULL deref.
   8 Remove it.
   9
  10 See #2885.
  11
  12 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
  13 ---
  14  drivers/staging/vc04_services/vc-sm-cma/vc_sm.c | 5 -----
  15  1 file changed, 5 deletions(-)
  16
  17 --- a/drivers/staging/vc04_services/vc-sm-cma/vc_sm.c
  18 +++ b/drivers/staging/vc04_services/vc-sm-cma/vc_sm.c
  19 @@ -25,7 +25,6 @@
  20  #include <linux/fs.h>
  21  #include <linux/kernel.h>
  22  #include <linux/list.h>
  23 -#include <linux/miscdevice.h>
  24  #include <linux/module.h>
  25  #include <linux/mm.h>
  26  #include <linux/of_device.h>
  27 @@ -72,7 +71,6 @@ struct sm_pde_t {
  28  struct sm_state_t {
  29         struct platform_device *pdev;
  30
  31 -       struct miscdevice dev;
  32         struct sm_instance *sm_handle;  /* Handle for videocore service. */
  33
  34         spinlock_t kernelid_map_lock;   /* Spinlock protecting kernelid_map */
  35 @@ -758,9 +756,6 @@ static int bcm2835_vc_sm_cma_remove(stru
  36  {
  37         pr_debug("[%s]: start\n", __func__);
  38         if (sm_inited) {
  39 -               /* Remove shared memory device. */
  40 -               misc_deregister(&sm_state->dev);
  41 -
  42                 /* Remove all proc entries. */
  43                 //debugfs_remove_recursive(sm_state->dir_root);
  44