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libpayload/udc: dwc2: Add timeout for shutdown operation 

BUG=b:24676003
BRANCH=None
TEST=Verified that udc shutdown returns after the timeout.

Change-Id: I5df598c4eddecbecb353343ef5a4e44eae4fc20b
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 268913f21adea9969c9f88e3cb759341a60719f0
Original-Change-Id: I3ee059791d6e821f83f9ac41fd7c5385bd60e21e
Original-Signed-off-by: Furquan Shaikh <furquan@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/310983
Original-Commit-Ready: Furquan Shaikh <furquan@chromium.org>
Original-Tested-by: Furquan Shaikh <furquan@chromium.org>
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/12347
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)
This commit is contained in:
Furquan Shaikh 2015-11-04 16:09:08 -08:00 committed by Patrick Georgi
parent e78a1bedc5
commit 3d6c95c1cd
1 changed files with 9 additions and 1 deletions
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10
payloads/libpayload/drivers/udc/dwc2.c
View File

@ -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);
}