linux/drivers/vfio
Alex Williamson 21ab799585 vfio/pci: Resolve sparse endian warnings in IGD support
Sparse warns:

sparse warnings: (new ones prefixed by >>)
>> drivers/vfio/pci/vfio_pci_igd.c:146:21: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned short [addressable] [usertype] val @@     got restricted __le16 [usertype] @@
   drivers/vfio/pci/vfio_pci_igd.c:146:21: sparse:     expected unsigned short [addressable] [usertype] val
   drivers/vfio/pci/vfio_pci_igd.c:146:21: sparse:     got restricted __le16 [usertype]
>> drivers/vfio/pci/vfio_pci_igd.c:161:21: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned int [addressable] [usertype] val @@     got restricted __le32 [usertype] @@
   drivers/vfio/pci/vfio_pci_igd.c:161:21: sparse:     expected unsigned int [addressable] [usertype] val
   drivers/vfio/pci/vfio_pci_igd.c:161:21: sparse:     got restricted __le32 [usertype]
   drivers/vfio/pci/vfio_pci_igd.c:176:21: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned short [addressable] [usertype] val @@     got restricted __le16 [usertype] @@
   drivers/vfio/pci/vfio_pci_igd.c:176:21: sparse:     expected unsigned short [addressable] [usertype] val
   drivers/vfio/pci/vfio_pci_igd.c:176:21: sparse:     got restricted __le16 [usertype]

These are due to trying to use an unsigned to store the result of
a cpu_to_leXX() conversion.  These are small variables, so pointer
tricks are wasteful and casting just generates different sparse
warnings.  Store to and copy results from a separate little endian
variable.

Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/202111290026.O3vehj03-lkp@intel.com/
Link: https://lore.kernel.org/r/163840226123.138003.7668320168896210328.stgit@omen
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2021-12-21 12:30:31 -07:00
..
fsl-mc Merge branch 'v5.16/vfio/diana-fsl-reset-v2' into v5.16/vfio/next 2021-10-11 15:50:49 -06:00
mdev vfio: simplify iommu group allocation for mediated devices 2021-09-30 12:46:44 -06:00
pci vfio/pci: Resolve sparse endian warnings in IGD support 2021-12-21 12:30:31 -07:00
platform vfio: Move vfio_iommu_group_get() to vfio_register_group_dev() 2021-09-30 12:46:43 -06:00
Kconfig vfio: Use kconfig if XX/endif blocks instead of repeating 'depends on' 2021-08-26 10:36:51 -06:00
Makefile vfio/fsl-mc: Add VFIO framework skeleton for fsl-mc devices 2020-10-07 14:17:33 -06:00
vfio_iommu_spapr_tce.c vfio/spapr_tce: reject mediated devices 2021-09-30 12:46:44 -06:00
vfio_iommu_type1.c vfio/iommu_type1: remove IS_IOMMU_CAP_DOMAIN_IN_CONTAINER 2021-09-30 12:46:45 -06:00
vfio_spapr_eeh.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
vfio.c vfio: remove all kernel-doc notation 2021-11-30 11:41:43 -07:00
vfio.h vfio: clean up the check for mediated device in vfio_iommu_type1 2021-09-30 12:46:44 -06:00
virqfd.c vfio/virqfd: Drain events from eventfd in virqfd_wakeup() 2020-11-15 09:49:10 -05:00