scsi: commonize purging requests

The code for canceling requests upon reset is already the same.  Clean
it up and move it to scsi-bus.c.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

1 files changed, 12 insertions, 0 deletions

diff --git a/hw/scsi-bus.c b/hw/scsi-bus.c
index c7748d0ea..c1e94fac9 100644
--- a/hw/scsi-bus.c
+++ b/hw/scsi-bus.c
@@ -549,6 +549,18 @@ void scsi_req_complete(SCSIRequest *req)
     scsi_req_unref(req);
 }
 
+void scsi_device_purge_requests(SCSIDevice *sdev)
+{
+    SCSIRequest *req;
+
+    while (!QTAILQ_EMPTY(&sdev->requests)) {
+        req = QTAILQ_FIRST(&sdev->requests);
+        sdev->info->cancel_io(req);
+        scsi_req_dequeue(req);
+        scsi_req_unref(req);
+    }
+}
+
 static char *scsibus_get_fw_dev_path(DeviceState *dev)
 {
     SCSIDevice *d = (SCSIDevice*)dev;