[Qemu-devel] [PATCH] scsi-generic: bugfixes for 'SCSIRequest' conversion

["Nicholas A. Bellinger" <nab@linux-iscsi.org>]

From: Nicholas Bellinger <nab@linux-iscsi.org>

This patch adds a handful of bugfixes for scsi-generic
that where added into:

commit a4194b3f79a85e111f000788ddec05d465748851
Author: Hannes Reinecke <hare@suse.de>
Date:   Mon Nov 22 15:39:33 2010 -0800

    scsi: Use 'SCSIRequest' directly

this includes:

*) Fix incorrect errno usage in switch() statement within
   scsi_command_complete()

*) Remove bogus scsi_command_complete() for residual case
   within scsi_read_complete()

*) Remove incorrect '-' sign from return in scsi_send_command()

Tested with .37-rc2 TCM_Loop FILEIO backstores on KVM host into
Debian Lenny v2.6.26 KVM guest with an xfs filesystem mount.

Signed-off-by: Nicholas A. Bellinger nab@linux-iscsi.org>
---
 hw/scsi-generic.c |   14 ++++++--------
 1 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/hw/scsi-generic.c b/hw/scsi-generic.c
index 7d30115..dc277cc 100644
--- a/hw/scsi-generic.c
+++ b/hw/scsi-generic.c
@@ -146,13 +146,13 @@ static void scsi_command_complete(void *opaque, int ret)
 
     if (ret != 0) {
         switch(ret) {
-            case ENODEV:
+            case -ENODEV:
                 s->senselen = scsi_set_sense(s, SENSE_CODE(LUN_NOT_SUPPORTED));
                 break;
-            case EINVAL:
+            case -EINVAL:
                 s->senselen = scsi_set_sense(s, SENSE_CODE(INVALID_FIELD));
                 break;
-            case EBADR:
+            case -EBADR:
                 s->senselen = scsi_set_sense(s, SENSE_CODE(TARGET_FAILURE));
                 break;
             default:
@@ -230,12 +230,10 @@ static void scsi_read_complete(void * opaque, int ret)
         return;
     }
     len = r->io_header.dxfer_len - r->io_header.resid;
-    DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, len);
+    DPRINTF("Data ready tag=0x%x remaining len=%d\n", r->req.tag, len);
 
     r->len = -1;
     r->req.bus->complete(&r->req, SCSI_REASON_DATA, len);
-    if (len == 0)
-        scsi_command_complete(r, 0);
 }
 
 /* Read more data from scsi device into buffer.  */
@@ -375,7 +373,7 @@ static int32_t scsi_send_command(SCSIRequest *req, uint8_t *cmd)
     }
     scsi_req_fixup(&r->req);
 
-    DPRINTF("Command: lun=%d tag=0x%x len %zd data=0x%02x", lun, tag,
+    DPRINTF("Command: lun=%d tag=0x%x len %zd data=0x%02x", req->lun, req->tag,
             r->req.cmd.xfer, cmd[0]);
 
 #ifdef DEBUG_SCSI
@@ -414,7 +412,7 @@ static int32_t scsi_send_command(SCSIRequest *req, uint8_t *cmd)
     r->len = r->req.cmd.xfer;
     if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
         r->len = 0;
-        return -r->req.cmd.xfer;
+        return r->req.cmd.xfer;
     }
 
     return r->req.cmd.xfer;
-- 
1.5.6.5