[intel-linux-intel-lts:4.19/android_r 20057/20689] arch/x86/crypto/poly1305_glue.c:212:4: warning: Assignment of function parameter has no effect outside the function. Did you forget dereferencing

[intel-linux-intel-lts:4.19/android_r 20057/20689] arch/x86/crypto/poly1305_glue.c:212:4: warning: Assignment of function parameter has no effect outside the function. Did you forget dereferencing

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 3041 bytes --]

CC: kbuild-all(a)lists.01.org
TO: "Jason A. Donenfeld" <zx2c4@kernel.org>
CC: "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>
CC: Herbert Xu <herbert@gondor.apana.org.au>

tree:   https://github.com/intel/linux-intel-lts.git 4.19/android_r
head:   4a6aef8d991e7c47e5da39927e0ad28ec90cd01b
commit: 1ff35ded67dfc68ff024c58e637dc9b9306a1800 [20057/20689] UPSTREAM: crypto: poly1305 - add new 32 and 64-bit generic versions
:::::: branch date: 30 hours ago
:::::: commit date: 7 weeks ago
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0

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


cppcheck possible warnings: (new ones prefixed by >>, may not real problems)

>> arch/x86/crypto/poly1305_glue.c:212:4: warning: Assignment of function parameter has no effect outside the function. Did you forget dereferencing it? [uselessAssignmentPtrArg]
      src += POLY1305_BLOCK_SIZE;
      ^

vim +212 arch/x86/crypto/poly1305_glue.c

1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  196  
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  197  static unsigned int crypto_poly1305_setdesckey(struct poly1305_desc_ctx *dctx,
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  198  					       const u8 *src, unsigned int srclen)
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  199  {
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  200  	if (!dctx->sset) {
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  201  		if (!dctx->rset && srclen >= POLY1305_BLOCK_SIZE) {
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  202  			poly1305_integer_setkey(dctx->r, src);
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  203  			src += POLY1305_BLOCK_SIZE;
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  204  			srclen -= POLY1305_BLOCK_SIZE;
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  205  			dctx->rset = 1;
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  206  		}
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  207  		if (srclen >= POLY1305_BLOCK_SIZE) {
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  208  			dctx->s[0] = get_unaligned_le32(src +  0);
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  209  			dctx->s[1] = get_unaligned_le32(src +  4);
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  210  			dctx->s[2] = get_unaligned_le32(src +  8);
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  211  			dctx->s[3] = get_unaligned_le32(src + 12);
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05 @212  			src += POLY1305_BLOCK_SIZE;
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  213  			srclen -= POLY1305_BLOCK_SIZE;
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  214  			dctx->sset = true;
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  215  		}
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  216  	}
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  217  	return srclen;
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  218  }
1ff35ded67dfc6 Jason A. Donenfeld 2020-01-05  219  

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