We need to cache-flush the hcca area after the initial memset, otherwise on the first hc_interrupt we might see an old $random value as done_head and try to interpret that as the address for a completed td (followed by chaos).
Signed-off-by: Hans de Goede hdegoede@redhat.com --- drivers/usb/host/ohci-hcd.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index 9bde2b2..ccbfc02 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -2205,6 +2205,7 @@ int ohci_register(struct udevice *dev, struct ohci_regs *regs) if (!ohci->hcca) return -ENOMEM; memset(ohci->hcca, 0, sizeof(struct ohci_hcca)); + flush_dcache_hcca(ohci->hcca);
if (hc_reset(ohci) < 0) return -EIO;