libnvdimm, btt: ensure that flags were also unchanged during a map_read

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In btt_map_read, we read the map twice to make sure that the map entry
didn't change after we added it to the read tracking table. In
anticipation of expanding the use of the error bit, also make sure that
the error and zero flags are constant across the two map reads.

Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

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Vishal Verma 2017-08-30 19:36:00 -06:00 • committed by Dan Williams

parent 0595d539a5

commit 1398199d84

1 changed files with 7 additions and 3 deletions

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drivers/nvdimm/btt.c

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