diff options
Diffstat (limited to 'payloads/libpayload/drivers')
| -rw-r--r-- | payloads/libpayload/drivers/usb/xhci.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/payloads/libpayload/drivers/usb/xhci.c b/payloads/libpayload/drivers/usb/xhci.c index 07d5b16486..749ff0a066 100644 --- a/payloads/libpayload/drivers/usb/xhci.c +++ b/payloads/libpayload/drivers/usb/xhci.c @@ -129,7 +129,12 @@ xhci_switchback_ppt_ports(pcidev_t addr) static long xhci_handshake(volatile u32 *const reg, u32 mask, u32 wait_for, long timeout_us) { - while ((*reg & mask) != wait_for && timeout_us--) udelay(1); + if (timeout_us <= 0) + return 0; + while ((*reg & mask) != wait_for && timeout_us != 0) { + --timeout_us; + udelay(1); + } return timeout_us; } |