ata_exec_internal_sg — execute libata internal command


unsigned ata_exec_internal_sg (struct ata_device * dev,
 struct ata_taskfile * tf,
 const u8 * cdb,
 int dma_dir,
 struct scatterlist * sgl,
 unsigned int n_elem,
 unsigned long timeout);


struct ata_device * dev

Device to which the command is sent

struct ata_taskfile * tf

Taskfile registers for the command and the result

const u8 * cdb

CDB for packet command

int dma_dir

Data transfer direction of the command

struct scatterlist * sgl

sg list for the data buffer of the command

unsigned int n_elem

Number of sg entries

unsigned long timeout

Timeout in msecs (0 for default)


Executes libata internal command with timeout. tf contains command on entry and result on return. Timeout and error conditions are reported via return value. No recovery action is taken after a command times out. It's caller's duty to clean up after timeout.

LOCKING: None. Should be called with kernel context, might sleep.


Zero on success, AC_ERR_* mask on failure