How to disable SMMU for pcie5?

I read the similar topics and went through the following steps:

1. 
   

   Download Linux_for_Tegra, kernel source and sample rootfs from this link https://developer.nvidia.com/embedded/linux-tegra-r3271

   
   


2. 
   

   I extracted rootfs to Linux_for_tegra/rootfs

   
   


3. 
   

   Removed this strings from tegra194-soc-pcie.dtsi
   
   iommus = <&smmu TEGRA_SID_PCIE5>;
   
   dma-coherent;

   
   


4. 
   

   In arm-smmu-t19x.c
   
   reg = readl_relaxed(ARM_SMMU_GR0_NS(smmu) +
   
   ARM_SMMU_GR0_sCR0);

   
   

   /* Enable fault reporting /
   
   -reg |= (sCR0_GFRE | sCR0_GFIE | sCR0_GCFGFRE | sCR0_GCFGFIE |
   
   sCR0_USFCFG);
   
   +reg |= (sCR0_GFRE | sCR0_GFIE | sCR0_GCFGFRE | sCR0_GCFGFIE);
   
   +
   
   +/ Disable Unidentified stream fault reporting */
   
   +reg &= ~(sCR0_USFCFG);

   
   


5. 
   

   ./nvbuild.sh -o $HOME/Desktop/kernel_out/ and copy *.dtb *.dtbo and Image to Linux_for_Tegra dir

   
   


6. 
   

   sudo ./apply_binaries.sh

   
   


7. 
   

   sudo ./flash.sh jetson-xavier-nx-devkit-emmc mmcblk0p1
   
   The script succseed and after rebooting jetson didnt start the system.
   
   So what am i doing wrong? I tryed to change /bootloader/t186ref/BCT/tegra194-memcfg-sw-override.cfg in Linux_for_Tegra as in the pcie smmu issue - #6 by vidyas but nothing changed.