From: kernel test robot <lkp@intel.com>
To: Alistair Francis <alistair.francis@wdc.com>
Cc: oe-kbuild-all@lists.linux.dev, 0day robot <lkp@intel.com>
Subject: drivers/scsi/virtio-scsi-pci-epf.c:2642:19: warning: implicit conversion from 'int' to 'u8' (aka 'unsigned char') changes value from 256 to 0
Date: Wed, 09 Sep 2026 13:43:24 +0200 [thread overview]
Message-ID: <202609091342.xK4Hb71Q-lkp@intel.com> (raw)
tree: https://github.com/intel-lab-lkp/linux/commits/alistair23-gmail-com/virtio_pci-Add-a-quirk-to-force-DMA-Map-API-for-certain-legacy-devices/20260901-114649
head: 3c8cbce2a30d266ce3f5ba5e91de82a74a2ca005
commit: 3c8cbce2a30d266ce3f5ba5e91de82a74a2ca005 scsi: Initial commit of VirtIO PCIe Endpoint Driver
date: 8 days ago
config: loongarch-allyesconfig (https://download.01.org/0day-ci/archive/20260909/202609091342.xK4Hb71Q-lkp@intel.com/config)
compiler: clang version 22.1.8 (https://github.com/llvm/llvm-project ca7933e47d3a3451d81e72ac174dcb5aa28b59d1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260909/202609091342.xK4Hb71Q-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202609091342.xK4Hb71Q-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> drivers/scsi/virtio-scsi-pci-epf.c:2642:19: warning: implicit conversion from 'int' to 'u8' (aka 'unsigned char') changes value from 256 to 0 [-Wconstant-conversion]
2637 | static struct pci_epf_header scsit_pci_epf_pci_header = {
| ~
2638 | .vendorid = PCI_VENDOR_ID_REDHAT_QUMRANET,
2639 | .deviceid = VIRTIO_TRANS_ID_SCSI,
2640 | .revid = VIRTIO_PCI_ABI_VERSION,
2641 | .baseclass_code = PCI_BASE_CLASS_STORAGE,
2642 | .subclass_code = PCI_CLASS_STORAGE_SCSI,
| ^~~~~~~~~~~~~~~~~~~~~~
include/linux/pci_ids.h:19:33: note: expanded from macro 'PCI_CLASS_STORAGE_SCSI'
19 | #define PCI_CLASS_STORAGE_SCSI 0x0100
| ^~~~~~
1 warning generated.
vim +2642 drivers/scsi/virtio-scsi-pci-epf.c
2636
2637 static struct pci_epf_header scsit_pci_epf_pci_header = {
2638 .vendorid = PCI_VENDOR_ID_REDHAT_QUMRANET,
2639 .deviceid = VIRTIO_TRANS_ID_SCSI,
2640 .revid = VIRTIO_PCI_ABI_VERSION,
2641 .baseclass_code = PCI_BASE_CLASS_STORAGE,
> 2642 .subclass_code = PCI_CLASS_STORAGE_SCSI,
2643 /* This is an invaild vendor ID, but we set it here
2644 * to activate the `force_use_map_api` quirk in the
2645 * hosts virtio_pci_legacy_probe() function.
2646 * This is because we can't set the VIRTIO_F_ACCESS_PLATFORM feature
2647 * with a legacy virtio device.
2648 */
2649 .subsys_vendor_id = 0xFFFF,
2650 .subsys_id = VIRTIO_ID_SCSI,
2651 .interrupt_pin = PCI_INTERRUPT_INTA,
2652 };
2653
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
reply other threads:[~2026-09-09 11:43 UTC|newest]
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