fs/nfs/read.c:51:2-7: WARNING: NULL check before some freeing functions is not needed.

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   8e938e39866920ddc266898e6ae1fffc5c8f51aa
commit: 303a78052091c81e9003915c521fdca1c7e117af NFSv4.2: Rework scratch handling for READ_PLUS (again)
date:   7 months ago
config: x86_64-randconfig-101-20240322 (https://download.01.org/0day-ci/archive/20240322/202403222313.MSx9nW9B-lkp@xxxxxxxxx/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202403222313.MSx9nW9B-lkp@xxxxxxxxx/

cocci warnings: (new ones prefixed by >>)
>> fs/nfs/read.c:51:2-7: WARNING: NULL check before some freeing functions is not needed.

vim +51 fs/nfs/read.c

    47	
    48	static void nfs_readhdr_free(struct nfs_pgio_header *rhdr)
    49	{
    50		if (rhdr->res.scratch != NULL)
  > 51			kfree(rhdr->res.scratch);
    52		kmem_cache_free(nfs_rdata_cachep, rhdr);
    53	}
    54	

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