Re: [linux-next:master 11969/13282] drivers/net/thunderbolt.c:733:47: sparse: sparse: restricted __le32 degrades to integer

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On Tue, Dec 06, 2022 at 02:40:16PM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head:   5d562c48a21eeb029a8fd3f18e1b31fd83660474
> commit: a479f9264bddfd0c266615b83f784222eccf9b91 [11969/13282] net: thunderbolt: Use bitwise types in the struct thunderbolt_ip_frame_header
> config: openrisc-randconfig-s041-20221205
> compiler: or1k-linux-gcc (GCC) 12.1.0
> reproduce:
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # apt-get install sparse
>         # sparse version: v0.6.4-39-gce1a6720-dirty
>         # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=a479f9264bddfd0c266615b83f784222eccf9b91
>         git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
>         git fetch --no-tags linux-next master
>         git checkout a479f9264bddfd0c266615b83f784222eccf9b91
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=openrisc SHELL=/bin/bash drivers/net/ drivers/nvme/target/
> 
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp@xxxxxxxxx>

Yes, it's expected. The change flip-flopped the warnings. As a result the
amount of warnings has been reduced from 17 to 9.

(wsum warning is not counted in the above statistics)

> sparse warnings: (new ones prefixed by >>)
> >> drivers/net/thunderbolt.c:733:47: sparse: sparse: restricted __le32 degrades to integer
> >> drivers/net/thunderbolt.c:741:47: sparse: sparse: restricted __le16 degrades to integer
>    drivers/net/thunderbolt.c:742:44: sparse: sparse: restricted __le16 degrades to integer
> >> drivers/net/thunderbolt.c:838:40: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __le32 [usertype] frame_size @@     got unsigned int [assigned] [usertype] frame_size @@
>    drivers/net/thunderbolt.c:838:40: sparse:     expected restricted __le32 [usertype] frame_size
>    drivers/net/thunderbolt.c:838:40: sparse:     got unsigned int [assigned] [usertype] frame_size
> >> drivers/net/thunderbolt.c:839:41: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __le32 [usertype] frame_count @@     got unsigned int [usertype] @@
>    drivers/net/thunderbolt.c:839:41: sparse:     expected restricted __le32 [usertype] frame_count
>    drivers/net/thunderbolt.c:839:41: sparse:     got unsigned int [usertype]
> >> drivers/net/thunderbolt.c:840:41: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __le16 [usertype] frame_index @@     got unsigned short [usertype] @@
>    drivers/net/thunderbolt.c:840:41: sparse:     expected restricted __le16 [usertype] frame_index
>    drivers/net/thunderbolt.c:840:41: sparse:     got unsigned short [usertype]
> >> drivers/net/thunderbolt.c:841:38: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __le16 [usertype] frame_id @@     got unsigned short [usertype] @@
>    drivers/net/thunderbolt.c:841:38: sparse:     expected restricted __le16 [usertype] frame_id
>    drivers/net/thunderbolt.c:841:38: sparse:     got unsigned short [usertype]
>    drivers/net/thunderbolt.c:842:62: sparse: sparse: restricted __le32 degrades to integer
>    drivers/net/thunderbolt.c:842:35: sparse: sparse: restricted __le16 degrades to integer
>    drivers/net/thunderbolt.c:953:23: sparse: sparse: incorrect type in initializer (different base types) @@     expected restricted __wsum [usertype] wsum @@     got restricted __be32 [usertype] @@
>    drivers/net/thunderbolt.c:953:23: sparse:     expected restricted __wsum [usertype] wsum
>    drivers/net/thunderbolt.c:953:23: sparse:     got restricted __be32 [usertype]

-- 
With Best Regards,
Andy Shevchenko






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