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-rw-r--r--payloads/libpayload/drivers/udc/dwc2.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/payloads/libpayload/drivers/udc/dwc2.c b/payloads/libpayload/drivers/udc/dwc2.c
index 32d6a5db9e..3c9b1576c2 100644
--- a/payloads/libpayload/drivers/udc/dwc2.c
+++ b/payloads/libpayload/drivers/udc/dwc2.c
@@ -695,7 +695,12 @@ static void dwc2_shutdown(struct usbdev_ctrl *this)
int i, j;
int is_empty = 0;
- while (!is_empty) {
+ uint64_t shutdown_timer_us = timer_us(0);
+ /* Wait up to 3 seconds for packets to be flushed out. */
+ uint64_t shutdown_timeout_us = 3 * 1000 * 1000UL;
+
+ while ((!is_empty) &&
+ (timer_us(shutdown_timer_us) < shutdown_timeout_us)) {
is_empty = 1;
this->poll(this);
for (i = 0; i < 16; i++)
@@ -704,6 +709,9 @@ static void dwc2_shutdown(struct usbdev_ctrl *this)
is_empty = 0;
}
+ if (timer_us(shutdown_timer_us) >= shutdown_timeout_us)
+ usb_debug("Error: Failed to empty queues.. timeout\n");
+
dwc2_force_shutdown(this);
}