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Date: Fri, 12 Jun 2020 13:28:59 +0800
From: kernel test robot <lkp@...el.com>
To: Henning Colliander <henning.colliander@...dente.se>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
Marc Kleine-Budde <mkl@...gutronix.de>,
Jimmy Assarsson <extja@...ser.com>,
Christer Beskow <chbe@...ser.com>
Subject: drivers/net/can/kvaser_pciefd.c:801:17: sparse: sparse: cast removes
address space '<asn:2>' of expression
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: b791d1bdf9212d944d749a5c7ff6febdba241771
commit: 26ad340e582d3d5958ed8456a1911d79cfb567b4 can: kvaser_pciefd: Add driver for Kvaser PCIEcan devices
date: 11 months ago
config: m68k-randconfig-s032-20200612 (attached as .config)
compiler: m68k-linux-gcc (GCC) 9.3.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.1-250-g42323db3-dirty
git checkout 26ad340e582d3d5958ed8456a1911d79cfb567b4
# save the attached .config to linux build tree
make W=1 C=1 ARCH=m68k CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
sparse warnings: (new ones prefixed by >>)
>> drivers/net/can/kvaser_pciefd.c:801:17: sparse: sparse: cast removes address space '<asn:2>' of expression
drivers/net/can/kvaser_pciefd.c:805:17: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:77:24: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:77:24: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:77:24: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:77:24: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast removes address space '<asn:2>' of expression
arch/m68k/include/asm/io_no.h:78:16: sparse: sparse: cast to restricted __le32
vim +801 drivers/net/can/kvaser_pciefd.c
764
765 static netdev_tx_t kvaser_pciefd_start_xmit(struct sk_buff *skb,
766 struct net_device *netdev)
767 {
768 struct kvaser_pciefd_can *can = netdev_priv(netdev);
769 unsigned long irq_flags;
770 struct kvaser_pciefd_tx_packet packet;
771 int nwords;
772 u8 count;
773
774 if (can_dropped_invalid_skb(netdev, skb))
775 return NETDEV_TX_OK;
776
777 nwords = kvaser_pciefd_prepare_tx_packet(&packet, can, skb);
778
779 spin_lock_irqsave(&can->echo_lock, irq_flags);
780
781 /* Prepare and save echo skb in internal slot */
782 can_put_echo_skb(skb, netdev, can->echo_idx);
783
784 /* Move echo index to the next slot */
785 can->echo_idx = (can->echo_idx + 1) % can->can.echo_skb_max;
786
787 /* Write header to fifo */
788 iowrite32(packet.header[0],
789 can->reg_base + KVASER_PCIEFD_KCAN_FIFO_REG);
790 iowrite32(packet.header[1],
791 can->reg_base + KVASER_PCIEFD_KCAN_FIFO_REG);
792
793 if (nwords) {
794 u32 data_last = ((u32 *)packet.data)[nwords - 1];
795
796 /* Write data to fifo, except last word */
797 iowrite32_rep(can->reg_base +
798 KVASER_PCIEFD_KCAN_FIFO_REG, packet.data,
799 nwords - 1);
800 /* Write last word to end of fifo */
> 801 __raw_writel(data_last, can->reg_base +
802 KVASER_PCIEFD_KCAN_FIFO_LAST_REG);
803 } else {
804 /* Complete write to fifo */
805 __raw_writel(0, can->reg_base +
806 KVASER_PCIEFD_KCAN_FIFO_LAST_REG);
807 }
808
809 count = ioread32(can->reg_base + KVASER_PCIEFD_KCAN_TX_NPACKETS_REG);
810 /* No room for a new message, stop the queue until at least one
811 * successful transmit
812 */
813 if (count >= KVASER_PCIEFD_CAN_TX_MAX_COUNT ||
814 can->can.echo_skb[can->echo_idx])
815 netif_stop_queue(netdev);
816
817 spin_unlock_irqrestore(&can->echo_lock, irq_flags);
818
819 return NETDEV_TX_OK;
820 }
821
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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