The scsi stack already uses DID_NO_CONNECT internally to signal
an invalid or removed device. This should be mapped to ENXIO,
as this then allows us to use a correct error code in
scsi_prep_return().
Signed-off-by: Hannes Reinecke <h...@suse.de>
---
block/blk-core.c | 3 +++
drivers/scsi/scsi_lib.c | 7 ++++++-
2 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index 1093ca1..875b9da 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -2321,6 +2321,9 @@ bool blk_update_request(struct request *req, int error,
unsigned int nr_bytes)
case -ENODATA:
error_type = "critical medium";
break;
+ case -ENXIO:
+ error_type = "invalid device";
+ break;
case -EIO:
default:
error_type = "I/O";
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 70ca1f6..86d9980 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -712,6 +712,7 @@ EXPORT_SYMBOL(scsi_release_buffers);
* -EBADE permanent nexus failure, retry on other path
* -ENOSPC No write space available
* -ENODATA Medium error
+ * -ENXIO Invalid or removed device
* -EIO unspecified I/O error
*/
static int __scsi_error_from_host_byte(struct scsi_cmnd *cmd, int result)
@@ -738,6 +739,10 @@ static int __scsi_error_from_host_byte(struct scsi_cmnd
*cmd, int result)
set_host_byte(cmd, DID_OK);
error = -ENODATA;
break;
+ case DID_NO_CONNECT:
+ set_host_byte(cmd, DID_OK);
+ error = -ENXIO;
+ break;
default:
error = -EIO;
break;
@@ -1286,7 +1291,7 @@ int scsi_prep_return(struct request_queue *q, struct
request *req, int ret)
switch (ret) {
case BLKPREP_KILL:
- req->errors = DID_NO_CONNECT << 16;
+ req->errors = -ENXIO;
/* release the command and kill it */
if (req->special) {
struct scsi_cmnd *cmd = req->special;
--
1.7.12.4
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