Re: [PATCH net-next v16 04/13] ax88179_178a: Add HW support for AX179A-based chips
From: kernel test robot
Date: Sun Oct 04 2026 - 16:12:47 EST
Hi Birger,
kernel test robot noticed the following build errors:
[auto build test ERROR on 071876fd50482a68603a9460d80dd6dd58827ee1]
url: https://github.com/intel-lab-lkp/linux/commits/Birger-Koblitz/phylink-Add-phylink_mac_interrupt/20261004-073905
base: 071876fd50482a68603a9460d80dd6dd58827ee1
patch link: https://lore.kernel.org/r/20261004-ax88179a-v16-4-2a9ae4e68f7b%40birger-koblitz.de
patch subject: [PATCH net-next v16 04/13] ax88179_178a: Add HW support for AX179A-based chips
config: s390-allmodconfig (https://download.01.org/0day-ci/archive/20261005/202610050430.ZlYvvYse-lkp@xxxxxxxxx/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 5f609f950d2e80addf5566623013db68394334db)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261005/202610050430.ZlYvvYse-lkp@xxxxxxxxx/reproduce)
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/202610050430.ZlYvvYse-lkp@xxxxxxxxx/
All errors (new ones prefixed by >>):
>> drivers/net/usb/ax88179a_devices.c:694:2: error: incompatible integer to pointer conversion passing 'u64' (aka 'unsigned long long') to parameter of type '__u64 *' (aka 'unsigned long long *'); take the address with & [-Wint-conversion]
694 | le64_to_cpus(rx_hdr);
| ^~~~~~~~~~~~~~~~~~~~
include/linux/byteorder/generic.h:111:22: note: expanded from macro 'le64_to_cpus'
111 | #define le64_to_cpus __le64_to_cpus
| ^
include/uapi/linux/byteorder/big_endian.h:94:37: note: expanded from macro '__le64_to_cpus'
94 | #define __le64_to_cpus(x) __swab64s((x))
| ^~~
include/uapi/linux/swab.h:265:46: note: passing argument to parameter 'p' here
265 | static __always_inline void __swab64s(__u64 *p)
| ^
1 error generated.
vim +694 drivers/net/usb/ax88179a_devices.c
655
656 static int ax88179a_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
657 {
658 struct ax88179_data *ax179_data = dev->driver_priv;
659 struct sk_buff *ax_skb;
660 u32 hdr_off, pkt_end;
661 u64 *pkt_desc_ptr;
662 u16 vlan_tag;
663 u16 pkt_cnt;
664 u64 rx_hdr;
665
666 /* SKB contents for AX179A-based chips:
667 * <packet 1>
668 * ...
669 * <packet N>
670 * <per-packet metadata entry 1>
671 * ...
672 * <per-packet metadata entry N>
673 * <rx_hdr>
674 *
675 * where:
676 * <packet N> contains pkt_len data bytes and padding:
677 * 2 bytes of IP alignment (optional, depends on AX_RX_CTL_IPE flag)
678 * packet data received
679 * optional padding to 8-bytes boundary
680 * <per-packet metadata entry N> contains 8 bytes:
681 * pkt_len and fields AX_RXHDR_*
682 * <rx-hdr> contains 8 bytes:
683 * pkt_cnt and hdr_off (offset of <per-packet metadata entry 1>)
684 *
685 * pkt_cnt is number of entries in the per-packet metadata array.
686 */
687
688 if (!skb || skb->len < sizeof(rx_hdr))
689 goto err;
690
691 /* RX Descriptor Header */
692 skb_trim(skb, skb->len - sizeof(rx_hdr));
693 rx_hdr = *(u64 *)skb_tail_pointer(skb);
> 694 le64_to_cpus(rx_hdr);
695
696 /* Check these packets */
697 hdr_off = FIELD_GET(AX179A_RX_DH_DESC_OFFSET, rx_hdr);
698 pkt_cnt = rx_hdr & AX179A_RX_DH_PKT_CNT_MASK;
699
700 /* Consistency check header position */
701 if (hdr_off != skb->len - (pkt_cnt * sizeof(rx_hdr)))
702 goto err;
703
704 /* Make sure that the bounds of the metadata array are inside the SKB
705 * (and in front of the counter at the end).
706 */
707 if (pkt_cnt * 8 + hdr_off > skb->len)
708 goto err;
709
710 /* Packets must not overlap the metadata array */
711 skb_trim(skb, hdr_off);
712
713 if (!pkt_cnt)
714 goto err;
715
716 /* Get the first RX packet descriptor */
717 pkt_desc_ptr = (u64 *)(skb->data + hdr_off);
718
719 pkt_end = 0;
720 while (pkt_cnt--) {
721 u64 pkt_desc = le64_to_cpu(*pkt_desc_ptr);
722 u32 pkt_len_plus_padd;
723 u32 pkt_len;
724
725 pkt_len = FIELD_GET(AX179A_RX_PD_LEN, pkt_desc);
726 pkt_len -= (ax179_data->ip_align ? 2 : 0);
727 pkt_len_plus_padd = ((pkt_len + 7 + (ax179_data->ip_align ? 2 : 0)) & 0x7FFF8);
728
729 pkt_end += pkt_len_plus_padd;
730 if (pkt_end > hdr_off || (pkt_cnt == 0 && pkt_end != hdr_off))
731 goto err;
732
733 if (pkt_desc & AX179A_RX_PD_DROP || !(pkt_desc & AX179A_RX_PD_RX_OK) ||
734 pkt_len > (dev->hard_mtu + AX179A_RX_HW_PAD) || pkt_len < 2 + ETH_HLEN) {
735 skb_pull(skb, pkt_len_plus_padd);
736
737 /* Next RX Packet Descriptor */
738 pkt_desc_ptr++;
739 continue;
740 }
741
742 ax_skb = netdev_alloc_skb_ip_align(dev->net, pkt_len);
743 if (!ax_skb)
744 goto err;
745
746 skb_put(ax_skb, pkt_len);
747 memcpy(ax_skb->data, skb->data + (ax179_data->ip_align ? AX179A_RX_HW_PAD : 0),
748 pkt_len);
749
750 if (ax179_data->rx_checksum)
751 ax88179a_rx_checksum(ax_skb, pkt_desc);
752
753 if (pkt_desc & AX179A_RX_PD_VLAN) {
754 vlan_tag = pkt_desc >> AX179A_RX_PD_VLAN_SHIFT;
755 __vlan_hwaccel_put_tag(ax_skb, htons(ETH_P_8021Q), vlan_tag);
756 }
757
758 usbnet_skb_return(dev, ax_skb);
759 skb_pull(skb, pkt_len_plus_padd);
760
761 /* Next RX Packet Header */
762 pkt_desc_ptr++;
763 }
764
765 return 1;
766
767 err:
768 return 0;
769 }
770
--
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