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authorHannes Reinecke <hare@suse.de>2013-07-01 15:16:23 +0200
committerJames Bottomley <JBottomley@Parallels.com>2013-08-23 12:31:59 -0400
commit0f7f6234d360341d74cfd6e77fcb315daf9905fd (patch)
treef954a89140ce83a06b30fdacc4aef90938961b44 /drivers/scsi/scsi_lib.c
parentc69c6be5a825382da93803e48850a42c4e4c16e1 (diff)
[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>
Diffstat (limited to 'drivers/scsi/scsi_lib.c')
-rw-r--r--drivers/scsi/scsi_lib.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 124392f3091..e2af8ae0d0c 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -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;