scsi: inline sg_io_sense_from_errno() into the callers.

Currently sg_io_sense_from_errno() converts the two input parameters
'errno' and 'io_hdr' into sense code and SCSI status. Having
split the function off into scsi_sense_from_errno() and
scsi_sense_from_host_status(), both of which are available generically,
we now inline the logic in the callers so that scsi-disk and
scsi-generic will be able to pass host_status to the HBA.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Message-Id: <20201116184041.60465-7-hare@suse.de>
[Put together from "scsi-disk: Add sg_io callback to evaluate status"
 and what remains of "scsi: split sg_io_sense_from_errno() in two functions",
 with many other fixes. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

2 files changed, 17 insertions, 30 deletions

diff --git a/scsi/qemu-pr-helper.c b/scsi/qemu-pr-helper.c
index 2733d92..7b9389b 100644
--- a/scsi/qemu-pr-helper.c
+++ b/scsi/qemu-pr-helper.c
@@ -149,19 +149,29 @@ static int do_sgio_worker(void *opaque)
     io_hdr.dxferp = (char *)data->buf;
     io_hdr.dxfer_len = data->sz;
     ret = ioctl(data->fd, SG_IO, &io_hdr);
-    status = sg_io_sense_from_errno(ret < 0 ? errno : 0, &io_hdr,
-                                    &sense_code);
+
+    if (ret < 0) {
+        status = scsi_sense_from_errno(errno, &sense_code);
+        if (status == CHECK_CONDITION) {
+            scsi_build_sense(data->sense, sense_code);
+        }
+    } else if (io_hdr.host_status != SCSI_HOST_OK) {
+        status = scsi_sense_from_host_status(io_hdr.host_status, &sense_code);
+        if (status == CHECK_CONDITION) {
+            scsi_build_sense(data->sense, sense_code);
+        }
+    } else if (io_hdr.driver_status & SG_ERR_DRIVER_TIMEOUT) {
+        status = BUSY;
+    } else {
+        status = io_hdr.status;
+    }
+
     if (status == GOOD) {
         data->sz -= io_hdr.resid;
     } else {
         data->sz = 0;
     }
 
-    if (status == CHECK_CONDITION &&
-        !(io_hdr.driver_status & SG_ERR_DRIVER_SENSE)) {
-        scsi_build_sense(data->sense, sense_code);
-    }
-
     return status;
 }
 
diff --git a/scsi/utils.c b/scsi/utils.c
index 28eb327..873e05a 100644
--- a/scsi/utils.c
+++ b/scsi/utils.c
@@ -658,26 +658,3 @@ int scsi_sense_from_host_status(uint8_t host_status,
     }
     return GOOD;
 }
-
-#ifdef CONFIG_LINUX
-int sg_io_sense_from_errno(int errno_value, struct sg_io_hdr *io_hdr,
-                           SCSISense *sense)
-{
-    if (errno_value != 0) {
-        return scsi_sense_from_errno(errno_value, sense);
-    } else {
-        int status = scsi_sense_from_host_status(io_hdr->host_status, sense);
-        if (status) {
-            return status;
-        } else if (io_hdr->driver_status & SG_ERR_DRIVER_TIMEOUT) {
-            return BUSY;
-        } else if (io_hdr->status) {
-            return io_hdr->status;
-        } else if (io_hdr->driver_status & SG_ERR_DRIVER_SENSE) {
-            return CHECK_CONDITION;
-        } else {
-            return GOOD;
-        }
-    }
-}
-#endif