Re: [PATCH 1/2] misc: fastrpc: Add fdlist implementation

[kernel test robot <lkp@xxxxxxxxx>]

Hi Jeya,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on char-misc/char-misc-testing]
[also build test ERROR on v5.16-rc3 next-20211130]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Jeya-R/misc-fastrpc-Add-fdlist-implementation/20211130-215833
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git 5d331b5922551637c586cdf5fdc1778910fc937f
config: hexagon-randconfig-r045-20211129 (https://download.01.org/0day-ci/archive/20211201/202112010754.IfnGCvD7-lkp@xxxxxxxxx/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 25eb7fa01d7ebbe67648ea03841cda55b4239ab2)
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
        # https://github.com/0day-ci/linux/commit/d9eaed76074c94c9751c3a587ef2409fa7ce153e
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Jeya-R/misc-fastrpc-Add-fdlist-implementation/20211130-215833
        git checkout d9eaed76074c94c9751c3a587ef2409fa7ce153e
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/misc/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

>> drivers/misc/fastrpc.c:923:25: error: use of undeclared identifier 'fl'
                   if (!fastrpc_map_find(fl, (int)fdlist[i], &mmap))
                                         ^
   1 error generated.


vim +/fl +923 drivers/misc/fastrpc.c

   886	
   887	static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx,
   888				    u32 kernel)
   889	{
   890		struct fastrpc_remote_arg *rpra = ctx->rpra;
   891		struct fastrpc_map *mmap = NULL;
   892		struct fastrpc_invoke_buf *list;
   893		struct fastrpc_phy_page *pages;
   894		u64 *fdlist;
   895		int i, inbufs, outbufs, handles;
   896	
   897		inbufs = REMOTE_SCALARS_INBUFS(ctx->sc);
   898		outbufs = REMOTE_SCALARS_OUTBUFS(ctx->sc);
   899		handles = REMOTE_SCALARS_INHANDLES(ctx->sc) + REMOTE_SCALARS_OUTHANDLES(ctx->sc);
   900		list = ctx->buf->virt + ctx->nscalars * sizeof(*rpra);
   901		pages = ctx->buf->virt + ctx->nscalars * (sizeof(*list) +
   902			sizeof(*rpra));
   903		fdlist = (uint64_t *)(pages + inbufs + outbufs + handles);
   904	
   905		for (i = inbufs; i < ctx->nbufs; ++i) {
   906			if (!ctx->maps[i]) {
   907				void *src = (void *)(uintptr_t)rpra[i].pv;
   908				void *dst = (void *)(uintptr_t)ctx->args[i].ptr;
   909				u64 len = rpra[i].len;
   910	
   911				if (!kernel) {
   912					if (copy_to_user((void __user *)dst, src, len))
   913						return -EFAULT;
   914				} else {
   915					memcpy(dst, src, len);
   916				}
   917			}
   918		}
   919	
   920		for (i = 0; i < FASTRPC_MAX_FDLIST; i++) {
   921			if (!fdlist[i])
   922				break;
 > 923			if (!fastrpc_map_find(fl, (int)fdlist[i], &mmap))
   924				fastrpc_map_put(mmap);
   925		}
   926	
   927		return 0;
   928	}
   929	

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