[U-Boot] [PATCH] ohci: Add missing cache-flush for hcca area
Hans de Goede
hdegoede at redhat.com
Tue Oct 20 18:39:29 CEST 2015
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 at 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;
--
2.5.0
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