[PATCH 4/6] remoteproc: mtk_vpu_rproc: Don't try to load empty PT_LOAD segment

[kernel test robot]

Hi Alexandre,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on robh/for-next]
[also build test WARNING on linus/master v5.8-rc5 next-20200713]
[cannot apply to remoteproc/for-next rpmsg/for-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use  as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Alexandre-Bailon/Add-support-of-mt8183-APU/20200713-213336
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: arm-allyesconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp at intel.com>

All warnings (new ones prefixed by >>):

>> drivers/remoteproc/mtk_apu_rproc.c:140:5: warning: no previous prototype for 'mtk_vpu_elf_sanity_check' [-Wmissing-prototypes]
     140 | int mtk_vpu_elf_sanity_check(struct rproc *rproc, const struct firmware *fw)
         |     ^~~~~~~~~~~~~~~~~~~~~~~~

vim +/mtk_vpu_elf_sanity_check +140 drivers/remoteproc/mtk_apu_rproc.c

   139	
 > 140	int mtk_vpu_elf_sanity_check(struct rproc *rproc, const struct firmware *fw)
   141	{
   142		const u8 *elf_data = fw->data;
   143		struct elf32_hdr *ehdr;
   144		struct elf32_phdr *phdr;
   145		int ret;
   146		int i;
   147	
   148		ret = rproc_elf_sanity_check(rproc, fw);
   149		if (ret)
   150			return ret;
   151	
   152		ehdr = (struct elf32_hdr *)elf_data;
   153		phdr = (struct elf32_phdr *)(elf_data + ehdr->e_phoff);
   154	
   155		for (i = 0; i < ehdr->e_phnum; i++, phdr++) {
   156			/* Remove empty PT_LOAD section */
   157			if (phdr->p_type == PT_LOAD && !phdr->p_paddr)
   158				phdr->p_type = PT_NULL;
   159		}
   160	
   161		return 0;
   162	}
   163	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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