Hi "Fabio, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on staging/staging-testing] url: https://github.com/0day-ci/linux/commits/Fabio-M-De-Francesco/staging-rtl... base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git 77ad1f0e99bd00af024e650b862cfda3137af660 config: powerpc64-randconfig-s032-20210709 (attached as .config) compiler: powerpc64le-linux-gcc (GCC) 9.3.0 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: v0.6.3-341-g8af24329-dirty # https://github.com/0day-ci/linux/commit/c296b1e11db85710adc1831c4cdb22951... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Fabio-M-De-Francesco/staging-rtl8188eu-Replace-a-custom-function-with-crc32_le/20210701-213922 git checkout c296b1e11db85710adc1831c4cdb2295192e447f # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=powerpc64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) drivers/staging/rtl8188eu/core/rtw_security.c:597:58: sparse: expected restricted __le32 [usertype] drivers/staging/rtl8188eu/core/rtw_security.c:597:58: sparse: got unsigned int drivers/staging/rtl8188eu/core/rtw_security.c:604:58: sparse: sparse: incorrect type in assignment (different base types) @@ expected restricted __le32 [usertype] @@ got unsigned int @@ drivers/staging/rtl8188eu/core/rtw_security.c:604:58: sparse: expected restricted __le32 [usertype] drivers/staging/rtl8188eu/core/rtw_security.c:604:58: sparse: got unsigned int drivers/staging/rtl8188eu/core/rtw_security.c:671:42: sparse: sparse: incorrect type in assignment (different base types) @@ expected restricted __le32 [usertype] @@ got unsigned int @@ drivers/staging/rtl8188eu/core/rtw_security.c:671:42: sparse: expected restricted __le32 [usertype] drivers/staging/rtl8188eu/core/rtw_security.c:671:42: sparse: got unsigned int vim +597 drivers/staging/rtl8188eu/core/rtw_security.c 544 545 /* The hlen isn't include the IV */ 546 u32 rtw_tkip_encrypt(struct adapter *padapter, struct xmit_frame *pxmitframe) 547 { /* exclude ICV */ 548 u16 pnl; 549 u32 pnh; 550 u8 rc4key[16]; 551 u8 ttkey[16]; 552 u8 crc[4]; 553 u8 hw_hdr_offset = 0; 554 struct arc4context mycontext; 555 int curfragnum, length; 556 557 u8 *pframe, *payload, *iv, *prwskey; 558 union pn48 dot11txpn; 559 struct sta_info *stainfo; 560 struct pkt_attrib *pattrib = &pxmitframe->attrib; 561 struct security_priv *psecuritypriv = &padapter->securitypriv; 562 struct xmit_priv *pxmitpriv = &padapter->xmitpriv; 563 u32 res = _SUCCESS; 564 565 if (!pxmitframe->buf_addr) 566 return _FAIL; 567 568 hw_hdr_offset = TXDESC_SIZE + 569 (pxmitframe->pkt_offset * PACKET_OFFSET_SZ); 570 pframe = pxmitframe->buf_addr + hw_hdr_offset; 571 /* 4 start to encrypt each fragment */ 572 if (pattrib->encrypt == _TKIP_) { 573 if (pattrib->psta) 574 stainfo = pattrib->psta; 575 else 576 stainfo = rtw_get_stainfo(&padapter->stapriv, &pattrib->ra[0]); 577 578 if (stainfo) { 579 if (is_multicast_ether_addr(pattrib->ra)) 580 prwskey = psecuritypriv->dot118021XGrpKey[psecuritypriv->dot118021XGrpKeyid].skey; 581 else 582 prwskey = &stainfo->dot118021x_UncstKey.skey[0]; 583 584 for (curfragnum = 0; curfragnum < pattrib->nr_frags; curfragnum++) { 585 iv = pframe + pattrib->hdrlen; 586 payload = pframe + pattrib->iv_len + pattrib->hdrlen; 587 588 GET_TKIP_PN(iv, dot11txpn); 589 590 pnl = (u16)(dot11txpn.val); 591 pnh = (u32)(dot11txpn.val >> 16); 592 phase1((u16 *)&ttkey[0], prwskey, &pattrib->ta[0], pnh); 593 phase2(&rc4key[0], prwskey, (u16 *)&ttkey[0], pnl); 594 595 if ((curfragnum + 1) == pattrib->nr_frags) { /* 4 the last fragment */ 596 length = pattrib->last_txcmdsz - pattrib->hdrlen - pattrib->iv_len - pattrib->icv_len; 598 599 arcfour_init(&mycontext, rc4key, 16); 600 arcfour_encrypt(&mycontext, payload, payload, length); 601 arcfour_encrypt(&mycontext, payload + length, crc, 4); 602 } else { 603 length = pxmitpriv->frag_len - pattrib->hdrlen - pattrib->iv_len - pattrib->icv_len; 604 *((__le32 *)crc) = ~crc32_le(~0, payload, length); 605 606 arcfour_init(&mycontext, rc4key, 16); 607 arcfour_encrypt(&mycontext, payload, payload, length); 608 arcfour_encrypt(&mycontext, payload + length, crc, 4); 609 610 pframe += pxmitpriv->frag_len; 611 pframe = (u8 *)round_up((size_t)(pframe), 4); 612 } 613 } 614 } else { 615 res = _FAIL; 616 } 617 } 618 return res; 619 } 620 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org