Merge tag 'iio-fixes-for-3.16c' of git://git.kernel.org/pub/scm/linux/kernel/git...

[karo-tx-linux.git] / drivers / scsi / virtio_scsi.c

diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c
index bcad917fd89a95b48e6be65399711a97ad37f8d6..308256b5e4cb07d1e3a839848aeb679aff5c8d6f 100644 (file)
--- a/drivers/scsi/virtio_scsi.c
+++ b/drivers/scsi/virtio_scsi.c
@@ -237,6 +237,16 @@ static void virtscsi_req_done(struct virtqueue *vq)
        virtscsi_vq_done(vscsi, req_vq, virtscsi_complete_cmd);
 };
 
+static void virtscsi_poll_requests(struct virtio_scsi *vscsi)
+{
+       int i, num_vqs;
+
+       num_vqs = vscsi->num_queues;
+       for (i = 0; i < num_vqs; i++)
+               virtscsi_vq_done(vscsi, &vscsi->req_vqs[i],
+                                virtscsi_complete_cmd);
+}
+
 static void virtscsi_complete_free(struct virtio_scsi *vscsi, void *buf)
 {
        struct virtio_scsi_cmd *cmd = buf;
@@ -591,6 +601,18 @@ static int virtscsi_tmf(struct virtio_scsi *vscsi, struct virtio_scsi_cmd *cmd)
            cmd->resp.tmf.response == VIRTIO_SCSI_S_FUNCTION_SUCCEEDED)
                ret = SUCCESS;
 
+       /*
+        * The spec guarantees that all requests related to the TMF have
+        * been completed, but the callback might not have run yet if
+        * we're using independent interrupts (e.g. MSI).  Poll the
+        * virtqueues once.
+        *
+        * In the abort case, sc->scsi_done will do nothing, because
+        * the block layer must have detected a timeout and as a result
+        * REQ_ATOM_COMPLETE has been set.
+        */
+       virtscsi_poll_requests(vscsi);
+
 out:
        mempool_free(cmd, virtscsi_cmd_pool);
        return ret;