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[SCSI] Document enhanced error codes 

Document the various error codes returned on I/O failure.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Hannes Reinecke 2013-07-01 15:16:23 +02:00 committed by James Bottomley
parent c69c6be5a8
commit 0f7f6234d3
1 changed files with 12 additions and 0 deletions
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12
drivers/scsi/scsi_lib.c
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@ -716,6 +716,18 @@ void scsi_release_buffers(struct scsi_cmnd *cmd)
}
EXPORT_SYMBOL(scsi_release_buffers);
/**
* __scsi_error_from_host_byte - translate SCSI error code into errno
* @cmd: SCSI command (unused)
* @result: scsi error code
*
* Translate SCSI error code into standard UNIX errno.
* Return values:
* -ENOLINK temporary transport failure
* -EREMOTEIO permanent target failure, do not retry
* -EBADE permanent nexus failure, retry on other path
* -EIO unspecified I/O error
*/
static int __scsi_error_from_host_byte(struct scsi_cmnd *cmd, int result)
{
int error = 0;