+#ifdef CONFIG_FAULT_INJECTION
+static enum hrtimer_restart dw_mci_fault_timer(struct hrtimer *t)
+{
+ struct dw_mci *host = container_of(t, struct dw_mci, fault_timer);
+ unsigned long flags;
+
+ spin_lock_irqsave(&host->irq_lock, flags);
+
+ if (!host->data_status)
+ host->data_status = SDMMC_INT_DCRC;
+ set_bit(EVENT_DATA_ERROR, &host->pending_events);
+ tasklet_schedule(&host->tasklet);
+
+ spin_unlock_irqrestore(&host->irq_lock, flags);
+
+ return HRTIMER_NORESTART;
+}
+
+static void dw_mci_start_fault_timer(struct dw_mci *host)
+{
+ struct mmc_data *data = host->data;
+
+ if (!data || data->blocks <= 1)
+ return;
+
+ if (!should_fail(&host->fail_data_crc, 1))
+ return;
+
+ /*
+ * Try to inject the error at random points during the data transfer.
+ */
+ hrtimer_start(&host->fault_timer,
+ ms_to_ktime(prandom_u32() % 25),
+ HRTIMER_MODE_REL);
+}
+
+static void dw_mci_stop_fault_timer(struct dw_mci *host)
+{
+ hrtimer_cancel(&host->fault_timer);
+}
+
+static void dw_mci_init_fault(struct dw_mci *host)
+{
+ host->fail_data_crc = (struct fault_attr) FAULT_ATTR_INITIALIZER;
+
+ hrtimer_init(&host->fault_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+ host->fault_timer.function = dw_mci_fault_timer;
+}
+#else
+static void dw_mci_init_fault(struct dw_mci *host)
+{
+}
+
+static void dw_mci_start_fault_timer(struct dw_mci *host)
+{
+}
+
+static void dw_mci_stop_fault_timer(struct dw_mci *host)
+{
+}
+#endif
+