drivers/scsi/ibmvscsi/ibmvfc.c:1696:25: warning: incompatible pointer to integer conversion passing 'struct ibmvfc_event to parameter of type '__u64' (aka 'unsigned long long')

From: kernel test robot
Date: Thu Jan 07 2021 - 12:26:40 EST

Hi Tyrel,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: e71ba9452f0b5b2e8dc8aa5445198cd9214a6a62
commit: 2aa0102c6688306548d81a958a6293936904ca75 scsi: ibmvfc: Use correlation token to tag commands
date: 7 weeks ago
config: powerpc-randconfig-r001-20210107 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 5c951623bc8965fa1e89660f2f5f4a2944e4981a)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install powerpc cross compiling tool for clang build
# apt-get install binutils-powerpc-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2aa0102c6688306548d81a958a6293936904ca75
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 2aa0102c6688306548d81a958a6293936904ca75
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc

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

All warnings (new ones prefixed by >>):

>> drivers/scsi/ibmvscsi/ibmvfc.c:1696:25: warning: incompatible pointer to integer conversion passing 'struct ibmvfc_event *' to parameter of type '__u64' (aka 'unsigned long long') [-Wint-conversion]
vfc_cmd->correlation = cpu_to_be64(evt);
^~~~~~~~~~~~~~~~
include/linux/byteorder/generic.h:92:21: note: expanded from macro 'cpu_to_be64'
#define cpu_to_be64 __cpu_to_be64
^
include/uapi/linux/byteorder/little_endian.h:37:52: note: expanded from macro '__cpu_to_be64'
#define __cpu_to_be64(x) ((__force __be64)__swab64((x)))
~~~~~~~~~^~~~
include/uapi/linux/swab.h:133:12: note: expanded from macro '__swab64'
__fswab64(x))
^
include/uapi/linux/swab.h:66:57: note: passing argument to parameter 'val' here
static inline __attribute_const__ __u64 __fswab64(__u64 val)
^
drivers/scsi/ibmvscsi/ibmvfc.c:2375:22: warning: incompatible pointer to integer conversion passing 'struct ibmvfc_event *' to parameter of type '__u64' (aka 'unsigned long long') [-Wint-conversion]
tmf->correlation = cpu_to_be64(evt);
^~~~~~~~~~~~~~~~
include/linux/byteorder/generic.h:92:21: note: expanded from macro 'cpu_to_be64'
#define cpu_to_be64 __cpu_to_be64
^
include/uapi/linux/byteorder/little_endian.h:37:52: note: expanded from macro '__cpu_to_be64'
#define __cpu_to_be64(x) ((__force __be64)__swab64((x)))
~~~~~~~~~^~~~
include/uapi/linux/swab.h:133:12: note: expanded from macro '__swab64'
__fswab64(x))
^
include/uapi/linux/swab.h:66:57: note: passing argument to parameter 'val' here
static inline __attribute_const__ __u64 __fswab64(__u64 val)
^
2 warnings generated.


vim +1696 drivers/scsi/ibmvscsi/ibmvfc.c

1648
1649 /**
1650 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1651 * @cmnd: struct scsi_cmnd to be executed
1652 * @done: Callback function to be called when cmnd is completed
1653 *
1654 * Returns:
1655 * 0 on success / other on failure
1656 **/
1657 static int ibmvfc_queuecommand_lck(struct scsi_cmnd *cmnd,
1658 void (*done) (struct scsi_cmnd *))
1659 {
1660 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host);
1661 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1662 struct ibmvfc_cmd *vfc_cmd;
1663 struct ibmvfc_event *evt;
1664 int rc;
1665
1666 if (unlikely((rc = fc_remote_port_chkready(rport))) ||
1667 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1668 cmnd->result = rc;
1669 done(cmnd);
1670 return 0;
1671 }
1672
1673 cmnd->result = (DID_OK << 16);
1674 evt = ibmvfc_get_event(vhost);
1675 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
1676 evt->cmnd = cmnd;
1677 cmnd->scsi_done = done;
1678 vfc_cmd = &evt->iu.cmd;
1679 memset(vfc_cmd, 0, sizeof(*vfc_cmd));
1680 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
1681 vfc_cmd->resp.len = cpu_to_be32(sizeof(vfc_cmd->rsp));
1682 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
1683 vfc_cmd->payload_len = cpu_to_be32(sizeof(vfc_cmd->iu));
1684 vfc_cmd->resp_len = cpu_to_be32(sizeof(vfc_cmd->rsp));
1685 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)cmnd->device->hostdata);
1686 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id);
1687 vfc_cmd->iu.xfer_len = cpu_to_be32(scsi_bufflen(cmnd));
1688 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun);
1689 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len);
1690
1691 if (cmnd->flags & SCMD_TAGGED) {
1692 vfc_cmd->task_tag = cpu_to_be64(cmnd->tag);
1693 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK;
1694 }
1695
> 1696 vfc_cmd->correlation = cpu_to_be64(evt);
1697
1698 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
1699 return ibmvfc_send_event(evt, vhost, 0);
1700
1701 ibmvfc_free_event(evt);
1702 if (rc == -ENOMEM)
1703 return SCSI_MLQUEUE_HOST_BUSY;
1704
1705 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1706 scmd_printk(KERN_ERR, cmnd,
1707 "Failed to map DMA buffer for command. rc=%d\n", rc);
1708
1709 cmnd->result = DID_ERROR << 16;
1710 done(cmnd);
1711 return 0;
1712 }
1713

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

Attachment: .config.gz
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