linux-kernel - Re: [PATCH drm-next 11/14] drm/nouveau: nvkm/vmm: implement raw ops to manage uvmm

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Date:   Fri, 20 Jan 2023 11:37:55 +0800
From:   kernel test robot <lkp@...el.com>
To:     Danilo Krummrich <dakr@...hat.com>, daniel@...ll.ch,
        airlied@...hat.com, christian.koenig@....com, bskeggs@...hat.com,
        jason@...kstrand.net, tzimmermann@...e.de, mripard@...nel.org,
        corbet@....net
Cc:     oe-kbuild-all@...ts.linux.dev, nouveau@...ts.freedesktop.org,
        Danilo Krummrich <dakr@...hat.com>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-doc@...r.kernel.org
Subject: Re: [PATCH drm-next 11/14] drm/nouveau: nvkm/vmm: implement raw ops
 to manage uvmm

Hi Danilo,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on 0b45ac1170ea6416bc1d36798414c04870cd356d]

url:    https://github.com/intel-lab-lkp/linux/commits/Danilo-Krummrich/drm-execution-context-for-GEM-buffers/20230118-141552
base:   0b45ac1170ea6416bc1d36798414c04870cd356d
patch link:    https://lore.kernel.org/r/20230118061256.2689-12-dakr%40redhat.com
patch subject: [PATCH drm-next 11/14] drm/nouveau: nvkm/vmm: implement raw ops to manage uvmm
config: arc-randconfig-s051-20230119 (https://download.01.org/0day-ci/archive/20230120/202301201115.THLpCShO-lkp@intel.com/config)
compiler: arc-elf-gcc (GCC) 12.1.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://github.com/intel-lab-lkp/linux/commit/5fca471110e52d7c8db10f9ff483134a546174a1
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Danilo-Krummrich/drm-execution-context-for-GEM-buffers/20230118-141552
        git checkout 5fca471110e52d7c8db10f9ff483134a546174a1
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arc SHELL=/bin/bash drivers/gpu/drm/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>

sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.c:413:34: sparse: sparse: non size-preserving integer to pointer cast

vim +413 drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.c

   406	
   407	static int
   408	nvkm_uvmm_mthd_raw_unmap(struct nvkm_uvmm *uvmm, struct nvif_vmm_raw_v0 *args)
   409	{
   410		struct nvkm_vmm *vmm = uvmm->vmm;
   411		struct nvkm_vma *vma;
   412	
 > 413		vma = (struct nvkm_vma *)args->handle;
   414		if (!vma)
   415			return -EINVAL;
   416	
   417		mutex_lock(&vmm->mutex);
   418		if (vma->busy) {
   419			VMM_DEBUG(vmm, "denied %016llx: %d", vma->addr, vma->busy);
   420			mutex_unlock(&vmm->mutex);
   421			return -ENOENT;
   422		}
   423		vma->sparse = args->sparse;
   424		nvkm_vmm_raw_unmap_locked(vmm, vma);
   425		mutex_unlock(&vmm->mutex);
   426	
   427		args->handle = 0;
   428		kfree(vma);
   429		return 0;
   430	}
   431	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests