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authorMike Snitzer <snitzer@kernel.org>2022-04-14 18:52:54 +0300
committerMike Snitzer <snitzer@kernel.org>2022-04-15 03:01:54 +0300
commit7dd06a2548b2bf516ef2e79873a9cdd00b354b99 (patch)
tree1383e1cbfb0755d97b8fabca747438d374f5b03a /drivers/video
parent73d7b06e902dd294e1f61554f7c403d0f705cf92 (diff)
downloadlinux-7dd06a2548b2bf516ef2e79873a9cdd00b354b99.tar.xz
dm: allow dm_accept_partial_bio() for dm_io without duplicate bios
The intent behind commit e6fc9f62ce6e ("dm: flag clones created by __send_duplicate_bios") was to formally disallow the use of dm_accept_partial_bio() where it simply isn't possible -- due to constraint that multiple bios cannot meaningfully update a shared tio->len_ptr. But that commit went too far and disallowed the case where "abormal" IO (e.g. WRITE_ZEROES) is only using a single bio. Fix this by not marking a dm_io with a single dm_target_io (and bio), that happens to be created by __send_duplicate_bios, as DM_TIO_IS_DUPLICATE_BIO. Also remove 'unsigned *len' parameter from alloc_multiple_bios(). This commit fixes a dm_accept_partial_bio() BUG_ON() with dm-zoned when a WRITE_ZEROES bio is issued. Fixes: 655f3aad7aa4 ("dm: switch dm_target_io booleans over to proper flags") Reported-by: Shinichiro Kawasaki <shinichiro.kawasaki@wdc.com> Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Diffstat (limited to 'drivers/video')
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