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scsi: core: Introduce scsi_status_is_check_condition()

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Add a helper function scsi_status_is_check_condition() to encapsulate the
frequent checks for SAM_STAT_CHECK_CONDITION.

Link: https://lore.kernel.org/r/20210427083046.31620-9-hare@suse.de
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Hannes Reinecke 2021-04-27 10:30:14 +02:00 committed by Martin K. Petersen
parent f2b1e9c6f8
commit d0672a03e0
5 changed files with 20 additions and 5 deletions
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2
drivers/scsi/ibmvscsi/ibmvscsi.c
View file

@ -1005,7 +1005,7 @@ static void handle_cmd_rsp(struct srp_event_struct *evt_struct)
if (cmnd) {
cmnd->result |= rsp->status;
if (((cmnd->result >> 1) & 0x1f) == CHECK_CONDITION)
if (scsi_status_is_check_condition(cmnd->result))
memcpy(cmnd->sense_buffer,
rsp->data,
be32_to_cpu(rsp->sense_data_len));

2
drivers/scsi/scsi.c
View file

@ -144,7 +144,7 @@ void scsi_log_completion(struct scsi_cmnd *cmd, int disposition)
(level > 1)) {
scsi_print_result(cmd, "Done", disposition);
scsi_print_command(cmd);
if (status_byte(cmd->result) == CHECK_CONDITION)
if (scsi_status_is_check_condition(cmd->result))
scsi_print_sense(cmd);
if (level > 3)
scmd_printk(KERN_INFO, cmd,

4
drivers/scsi/scsi_error.c
View file

@ -1258,7 +1258,7 @@ int scsi_eh_get_sense(struct list_head *work_q,
current->comm));
break;
}
if (status_byte(scmd->result) != CHECK_CONDITION)
if (!scsi_status_is_check_condition(scmd->result))
/*
* don't request sense if there's no check condition
* status because the error we're processing isn't one
@ -1774,7 +1774,7 @@ int scsi_noretry_cmd(struct scsi_cmnd *scmd)
return (scmd->request->cmd_flags & REQ_FAILFAST_DRIVER);
}
if (status_byte(scmd->result) != CHECK_CONDITION)
if (!scsi_status_is_check_condition(scmd->result))
return 0;
check_type:

2
drivers/scsi/scsi_lib.c
View file

@ -2164,7 +2164,7 @@ scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
goto retry;
}
}
if ((status_byte(result) == CHECK_CONDITION) &&
if (scsi_status_is_check_condition(result) &&
sshdr->sense_key == UNIT_ATTENTION &&
retry_count) {
retry_count--;

15
include/scsi/scsi.h
View file

@ -62,6 +62,21 @@ static inline int scsi_is_wlun(u64 lun)
return (lun & 0xff00) == SCSI_W_LUN_BASE;
}
/**
* scsi_status_is_check_condition - check the status return.
*
* @status: the status passed up from the driver (including host and
* driver components)
*
* This returns true if the status code is SAM_STAT_CHECK_CONDITION.
*/
static inline int scsi_status_is_check_condition(int status)
{
if (status < 0)
return false;
status &= 0xfe;
return status == SAM_STAT_CHECK_CONDITION;
}
/*
* MESSAGE CODES