tree c7f8c4c49a2a9d07bcf13d997cdb41ff187a7732
parent fbd83006e3e536fcb103228d2422ea63129ccb03
author Martin K. Petersen <martin.petersen@oracle.com> 1463105854 -0400
committer Martin K. Petersen <martin.petersen@oracle.com> 1464833267 -0400

sd: Fix rw_max for devices that report an optimal xfer size

For historic reasons, io_opt is in bytes and max_sectors in block layer
sectors. This interface inconsistency is error prone and should be
fixed. But for 4.4--4.7 let's make the unit difference explicit via a
wrapper function.

Fixes: d0eb20a863ba ("sd: Optimal I/O size is in bytes, not sectors")
Cc: stable@vger.kernel.org # 4.4+
Reported-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Andrew Patterson <andrew.patterson@hpe.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>