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Commit fe86cdce authored by Mike Snitzer's avatar Mike Snitzer Committed by Jens Axboe
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block: do not artificially constrain max_sectors for stacking drivers



blk_set_stacking_limits is intended to allow stacking drivers to build
up the limits of the stacked device based on the underlying devices'
limits.  But defaulting 'max_sectors' to BLK_DEF_MAX_SECTORS (1024)
doesn't allow the stacking driver to inherit a max_sectors larger than
1024 -- due to blk_stack_limits' use of min_not_zero.

It is now clear that this artificial limit is getting in the way so
change blk_set_stacking_limits's max_sectors to UINT_MAX (which allows
stacking drivers like dm-multipath to inherit 'max_sectors' from the
underlying paths).

Reported-by: default avatarVijay Chauhan <vijay.chauhan@netapp.com>
Tested-by: default avatarVijay Chauhan <vijay.chauhan@netapp.com>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent a051661c
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