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| author | Hannes Reinecke <hare@suse.de> | 2021-04-27 11:30:23 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-06-01 05:48:22 +0300 |
| commit | 735b830c6104af6f4ec0e9a22822cd4067ac0bf5 (patch) | |
| tree | 943423e2fd22d0a9863eff80cd2e3090ca5be75e /include/scsi | |
| parent | f6b5a697064900c207876c12af55e176ec83f49e (diff) | |
| download | linux-735b830c6104af6f4ec0e9a22822cd4067ac0bf5.tar.xz | |
scsi: core: Add scsi_msg_to_host_byte()
Add helper to convert message byte into a host byte code.
Link: https://lore.kernel.org/r/20210427083046.31620-18-hare@suse.de
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'include/scsi')
| -rw-r--r-- | include/scsi/scsi_cmnd.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index 760990116024..efcf33c29efa 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -335,6 +335,32 @@ static inline u8 get_host_byte(struct scsi_cmnd *cmd) return (cmd->result >> 16) & 0xff; } +/** + * scsi_msg_to_host_byte() - translate message byte + * + * Translate the SCSI parallel message byte to a matching + * host byte setting. A message of COMMAND_COMPLETE indicates + * a successful command execution, any other message indicate + * an error. As the messages themselves only have a meaning + * for the SCSI parallel protocol this function translates + * them into a matching host byte value for SCSI EH. + */ +static inline void scsi_msg_to_host_byte(struct scsi_cmnd *cmd, u8 msg) +{ + switch (msg) { + case COMMAND_COMPLETE: + break; + case ABORT_TASK_SET: + set_host_byte(cmd, DID_ABORT); + break; + case TARGET_RESET: + set_host_byte(cmd, DID_RESET); + break; + default: + set_host_byte(cmd, DID_ERROR); + break; + } +} static inline unsigned scsi_transfer_length(struct scsi_cmnd *scmd) { |