From: Shaohua Li <redacted>

Fix some problems when setting up loop device with a block device as back file
and create/mount ext4 in the loop device.

BTW: blkdev_issue_zeroout retries if we immediately find the device doesn't
support zeroout, but it doesn't retry if submit_bio_wait returns -EOPNOTSUPP.
Is this correct behavior?

Thanks,
Shaohua

Shaohua Li (3):
  block/loop: don't hijack error number
  block/loop: use FALLOC_FL_ZERO_RANGE for REQ_OP_WRITE_ZEROES
  block/loop: suppress discard IO error message

 drivers/block/loop.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

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2.9.5