ata_build_rw_tf
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## Name

ata_build_rw_tf — Build ATA taskfile for given read/write request

## Synopsis

`int ata_build_rw_tf (` | struct ata_taskfile * | tf,
| struct ata_device * | dev,
| u64 | block,
| u32 | n_block,
| unsigned int | tf_flags,
| unsigned int | tag`)`;

## Arguments

`tf`

  Target ATA taskfile

`dev`

  ATA device `tf` belongs to

`block`

  Block address

`n_block`

  Number of blocks

`tf_flags`

  RW/FUA etc...

`tag`

  tag

## LOCKING

None.

Build ATA taskfile `tf` for read/write request described by `block`, `n_block`, `tf_flags` and `tag` on `dev`.

## RETURNS

0 on success, -ERANGE if the request is too large for `dev`, -EINVAL if the request is invalid.

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