dax: guarantee page aligned results from bdev_direct_access()

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If a ->direct_access() implementation ever returns a map count less than
PAGE_SIZE, catch the error in bdev_direct_access().  This simplifies
error checking in upper layers.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reported-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Dan Williams 2016-01-15 16:55:56 -08:00 • committed by Linus Torvalds

parent 0e749e5424

commit fe683adabf

2 changed files with 2 additions and 1 deletions

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fs/block_dev.c

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fs/dax.c

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