scsi_eh_prep_cmnd
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## Name

scsi_eh_prep_cmnd — Save a scsi command info as part of error recovery

## Synopsis

`void scsi_eh_prep_cmnd (` | struct scsi_cmnd * scmd,
| struct scsi_eh_save * ses,
| unsigned char * cmnd,
| int cmnd_size,
| unsigned sense_bytes`)`;

## Arguments

`scmd`

  SCSI command structure to hijack

`ses`

  structure to save restore information

`cmnd`

  CDB to send. Can be NULL if no new cmnd is needed

`cmnd_size`

  size in bytes of `cmnd` (must be <= BLK_MAX_CDB)

`sense_bytes`

  size of sense data to copy. or 0 (if != 0 `cmnd` is ignored)

## Description

This function is used to save a scsi command information before re-execution as part of the error recovery process. If `sense_bytes` is 0 the command sent must be one that does not transfer any data. If `sense_bytes` != 0 `cmnd` is ignored and this functions sets up a REQUEST_SENSE command and cmnd buffers to read `sense_bytes` into `scmd`->sense_buffer.

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