[Qemu-devel] [PATCH 1/2] scsi-bus: fix transfer length and direction for VERIFY command

[Paolo Bonzini <pbonzini@redhat.com>]

The amount of bytes to transfer depends on the BYTCHK field.
If any data is transferred, it is sent to the device.

Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/scsi/scsi-bus.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/hw/scsi/scsi-bus.c b/hw/scsi/scsi-bus.c
index 18a0399..55aef9b 100644
--- a/hw/scsi/scsi-bus.c
+++ b/hw/scsi/scsi-bus.c
@@ -851,7 +851,6 @@ static int scsi_req_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
     case RELEASE:
     case ERASE:
     case ALLOW_MEDIUM_REMOVAL:
-    case VERIFY_10:
     case SEEK_10:
     case SYNCHRONIZE_CACHE:
     case SYNCHRONIZE_CACHE_16:
@@ -868,6 +867,15 @@ static int scsi_req_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
     case ALLOW_OVERWRITE:
         cmd->xfer = 0;
         break;
+    case VERIFY_10:
+    case VERIFY_12:
+    case VERIFY_16:
+        if ((buf[1] & 2) == 0) {
+            cmd->xfer = 0;
+        } else if ((buf[1] & 4) == 1) {
+            cmd->xfer = dev->blocksize;
+        }
+        break;
     case MODE_SENSE:
         break;
     case WRITE_SAME_10:
@@ -1065,6 +1073,9 @@ static void scsi_cmd_xfer_mode(SCSICommand *cmd)
     case WRITE_VERIFY_12:
     case WRITE_16:
     case WRITE_VERIFY_16:
+    case VERIFY_10:
+    case VERIFY_12:
+    case VERIFY_16:
     case COPY:
     case COPY_VERIFY:
     case COMPARE:
-- 
1.8.4.2