kernel: ltq-vdsl-vr9-mei: Fix compilation with Linux 5.15

The result of copy_to_user() now has to be checked explicitly. Also
MODULE_SUPPORTED_DEVICE is gone after Linux 5.10.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>

2 files changed, 71 insertions, 10 deletions

diff --git a/package/kernel/lantiq/ltq-vdsl-vr9-mei/patches/100-compat.patch b/package/kernel/lantiq/ltq-vdsl-vr9-mei/patches/100-compat.patch
index 61ea826cb4..7e7381a346 100644
--- a/package/kernel/lantiq/ltq-vdsl-vr9-mei/patches/100-compat.patch
+++ b/package/kernel/lantiq/ltq-vdsl-vr9-mei/patches/100-compat.patch
@@ -43,7 +43,18 @@
  #ifdef MODULE
  #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0))
  MODULE_PARM(major_number, "b");
-@@ -1479,7 +1483,11 @@ struct proc_entry {
+@@ -1256,7 +1260,9 @@ static long MEI_Ioctl( struct file *filp
+ MEI_IOCTL_RETURN:
+ 
+    local_args.drv_ioctl.retCode = ret;
+-   copy_to_user( ((IOCTL_MEI_arg_t *)nArgument), &local_args, retSize);
++   if ( ret == IFX_SUCCESS &&
++        copy_to_user( ((IOCTL_MEI_arg_t *)nArgument), &local_args, retSize) )
++      ret = -e_MEI_ERR_RETURN_ARG;
+ 
+    return (ret < 0) ? -1 : 0;
+ }
+@@ -1479,7 +1485,11 @@ struct proc_entry {
     char name[32];
     proc_rd_callback_t rd;
     proc_wr_callback_t wr;
@@ -55,7 +66,7 @@
     int entity;
  };
  
-@@ -1869,6 +1877,7 @@ static int mei_proc_single_open(struct i
+@@ -1869,6 +1879,7 @@ static int mei_proc_single_open(struct i
  static void mei_proc_entry_create(struct proc_dir_entry *parent_node,
                                    struct proc_entry *proc_entry)
  {
@@ -63,7 +74,7 @@
     memset(&proc_entry->ops, 0, sizeof(struct file_operations));
     proc_entry->ops.owner = THIS_MODULE;
  
-@@ -1879,6 +1888,17 @@ static void mei_proc_entry_create(struct
+@@ -1879,6 +1890,17 @@ static void mei_proc_entry_create(struct
     proc_entry->ops.llseek = seq_lseek;
     if (proc_entry->wr)
        proc_entry->ops.write = proc_entry->wr;
@@ -81,7 +92,7 @@
  
     proc_create_data(proc_entry->name,
                       (S_IFREG | S_IRUGO),
-@@ -2174,9 +2194,11 @@ static int MEI_module_init (void)
+@@ -2174,9 +2196,11 @@ static int MEI_module_init (void)
        return (result);
     }
  
@@ -93,7 +104,7 @@
  
     return 0;
  }
-@@ -2304,6 +2326,10 @@ static void MEI_module_exit (void)
+@@ -2304,6 +2328,10 @@ static void MEI_module_exit (void)
  
  #else
     unregister_chrdev ( major_number , DRV_MEI_NAME );
@@ -104,7 +115,7 @@
  #endif
  
  #if CONFIG_PROC_FS
-@@ -2388,9 +2414,11 @@ static void MEI_module_exit (void)
+@@ -2388,9 +2416,11 @@ static void MEI_module_exit (void)
              ("MEI_DRV: Chipset Basic Exit failed" MEI_DRV_CRLF));
     }
  
@@ -116,7 +127,7 @@
  
  #if (MEI_SUPPORT_DEBUG_LOGGER == 1)
     if (nl_debug_sock)
-@@ -2514,6 +2542,10 @@ static int MEI_InitModuleRegCharDev(cons
+@@ -2514,6 +2544,10 @@ static int MEI_InitModuleRegCharDev(cons
              ("Using major number %d" MEI_DRV_CRLF, major_number));
     }
  
@@ -127,7 +138,7 @@
     return 0;
  #endif      /* CONFIG_DEVFS_FS */
  }
-@@ -2563,21 +2595,32 @@ static int MEI_InitModuleBasics(void)
+@@ -2563,21 +2597,32 @@ static int MEI_InitModuleBasics(void)
  }
  
  #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0))
@@ -160,7 +171,7 @@
  
     return 0;
  }
-@@ -2905,11 +2948,15 @@ IFX_int32_t MEI_IoctlInitDevice(
+@@ -2905,11 +2950,15 @@ IFX_int32_t MEI_IoctlInitDevice(
              pMeiDev->eModePoll = e_MEI_DEV_ACCESS_MODE_IRQ;
              pMeiDev->intMask   = ME_ARC2ME_INTERRUPT_UNMASK_ALL;
  
@@ -176,6 +187,46 @@
  
              pTmpXCntrl = MEI_VrxXDevToIrqListAdd(
                                            MEI_DRV_LINENUM_GET(pMeiDev),
+@@ -3249,9 +3298,11 @@ static int MEI_IoctlMeiDbgAccessWr_Wrap(
+    ret =  MEI_IoctlMeiDbgAccessWr( pMeiDynCntrl, pLocalArgument);
+ 
+    /* return arguments - count */
+-   copy_to_user( (void *)&pUserArgument->count,
+-                 (void *)&pLocalArgument->count,
+-                 sizeof(pUserArgument->count) ) ;
++   if ( ret == IFX_SUCCESS &&
++        copy_to_user( (void *)&pUserArgument->count,
++                      (void *)&pLocalArgument->count,
++                      sizeof(pUserArgument->count) ) )
++      ret = -e_MEI_ERR_RETURN_ARG;
+ 
+    return ret;
+ }
+@@ -3278,16 +3329,18 @@ static int MEI_IoctlMeiDbgAccessRd_Wrap(
+    if ( pLocalArgument->count )
+    {
+       /* return the buffer */
+-      copy_to_user( pUserBuf,
+-                    pLocalArgument->pData_32,
+-                    pLocalArgument->count * sizeof(IFX_uint32_t) ) ;
++      if ( copy_to_user( pUserBuf,
++                         pLocalArgument->pData_32,
++                         pLocalArgument->count * sizeof(IFX_uint32_t) ) )
++         ret = -e_MEI_ERR_RETURN_ARG;
+ 
+    }
+ 
+    /* return count argument */
+-   copy_to_user( (void *)&pUserArgument->count,
+-                 (void *)&pLocalArgument->count,
+-                 sizeof(pUserArgument->count) ) ;
++   if ( copy_to_user( (void *)&pUserArgument->count,
++                      (void *)&pLocalArgument->count,
++                      sizeof(pUserArgument->count) ) )
++      ret = -e_MEI_ERR_RETURN_ARG;
+ 
+    return ret;
+ }
 --- a/src/drv_mei_cpe_api_atm_ptm_intern.c
 +++ b/src/drv_mei_cpe_api_atm_ptm_intern.c
 @@ -147,6 +147,7 @@ IFX_int32_t MEI_InternalXtmSwhowtimeExit
diff --git a/package/kernel/lantiq/ltq-vdsl-vr9-mei/patches/101_no-date-time.patch b/package/kernel/lantiq/ltq-vdsl-vr9-mei/patches/101_no-date-time.patch
index 055797ad4d..9785bfc4c1 100644
--- a/package/kernel/lantiq/ltq-vdsl-vr9-mei/patches/101_no-date-time.patch
+++ b/package/kernel/lantiq/ltq-vdsl-vr9-mei/patches/101_no-date-time.patch
@@ -1,6 +1,6 @@
 --- a/src/drv_mei_cpe_linux.c
 +++ b/src/drv_mei_cpe_linux.c
-@@ -1503,8 +1503,8 @@ struct proc_entry {
+@@ -1505,8 +1505,8 @@ struct proc_entry {
  static void MEI_GetVersionProc(struct seq_file *s)
  {
     seq_printf(s, "%s" MEI_DRV_CRLF, &MEI_WHATVERSION[4]);
@@ -11,3 +11,13 @@
  }
  
  /**
+@@ -4233,7 +4233,9 @@ module_exit (MEI_module_exit);
+ #ifdef MODULE
+ MODULE_AUTHOR("www.lantiq.com");
+ MODULE_DESCRIPTION("MEI CPE Driver - www.lantiq.com");
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(5,11,0))
+ MODULE_SUPPORTED_DEVICE("MEI CPE Interface");
++#endif
+ MODULE_LICENSE ("GPL");
+ #endif /* #ifdef MODULE*/
+