Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

* RTC fixes (Artem)
* icount fixes (Artem)
* rr fixes (Pavel, myself)
* hotplug cleanup (Igor)
* SCSI fixes (myself)
* 4.20-rc1 KVM header update (myself)
* coalesced PIO support (Peng Hao)
* HVF fixes (Roman B.)
* Hyper-V refactoring (Roman K.)
* Support for Hyper-V IPI (Vitaly)

# gpg: Signature made Fri 19 Oct 2018 12:47:58 BST
# gpg:                using RSA key BFFBD25F78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>"
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* remotes/bonzini/tags/for-upstream: (47 commits)
  replay: pass raw icount value to replay_save_clock
  target/i386: kvm: just return after migrate_add_blocker failed
  hyperv_testdev: add SynIC message and event testmodes
  hyperv: process POST_MESSAGE hypercall
  hyperv: add support for KVM_HYPERV_EVENTFD
  hyperv: process SIGNAL_EVENT hypercall
  hyperv: add synic event flag signaling
  hyperv: add synic message delivery
  hyperv: make overlay pages for SynIC
  hyperv: only add SynIC in compatible configurations
  hyperv: qom-ify SynIC
  hyperv:synic: split capability testing and setting
  i386: add hyperv-stub for CONFIG_HYPERV=n
  default-configs: collect CONFIG_HYPERV* in hyperv.mak
  hyperv: factor out arch-independent API into hw/hyperv
  hyperv: make hyperv_vp_index inline
  hyperv: split hyperv-proto.h into x86 and arch-independent parts
  hyperv: rename kvm_hv_sint_route_set_sint
  hyperv: make HvSintRoute reference-counted
  hyperv: address HvSintRoute by X86CPU pointer
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 16 insertions, 13 deletions

diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
index c43163cef4..e2c5408aa2 100644
--- a/hw/scsi/scsi-disk.c
+++ b/hw/scsi/scsi-disk.c
@@ -441,9 +441,18 @@ static bool scsi_handle_rw_error(SCSIDiskReq *r, int error, bool acct_failed)
         }
         switch (error) {
         case 0:
-            /* The command has run, no need to fake sense.  */
+            /* A passthrough command has run and has produced sense data; check
+             * whether the error has to be handled by the guest or should rather
+             * pause the host.
+             */
             assert(r->status && *r->status);
-            scsi_req_complete(&r->req, *r->status);
+            error = scsi_sense_buf_to_errno(r->req.sense, sizeof(r->req.sense));
+            if (error == ECANCELED || error == EAGAIN || error == ENOTCONN ||
+                error == 0)  {
+                /* These errors are handled by guest. */
+                scsi_req_complete(&r->req, *r->status);
+                return true;
+            }
             break;
         case ENOMEDIUM:
             scsi_check_condition(r, SENSE_CODE(NO_MEDIUM));
@@ -462,23 +471,17 @@ static bool scsi_handle_rw_error(SCSIDiskReq *r, int error, bool acct_failed)
             break;
         }
     }
-    if (!error) {
-        assert(r->status && *r->status);
-        error = scsi_sense_buf_to_errno(r->req.sense, sizeof(r->req.sense));
 
-        if (error == ECANCELED || error == EAGAIN || error == ENOTCONN ||
-            error == 0)  {
-            /* These errors are handled by guest. */
-            scsi_req_complete(&r->req, *r->status);
-            return true;
-        }
+    blk_error_action(s->qdev.conf.blk, action, is_read, error);
+    if (action == BLOCK_ERROR_ACTION_IGNORE) {
+        scsi_req_complete(&r->req, 0);
+        return true;
     }
 
-    blk_error_action(s->qdev.conf.blk, action, is_read, error);
     if (action == BLOCK_ERROR_ACTION_STOP) {
         scsi_req_retry(&r->req);
     }
-    return action != BLOCK_ERROR_ACTION_IGNORE;
+    return false;
 }
 
 static void scsi_write_complete_noio(SCSIDiskReq *r, int ret)