From: Hans de Goede <hdegoede@redhat.com>
Date: Tue, 20 Oct 2015 16:39:29 +0000 (+0200)
Subject: ohci: Add missing cache-flush for hcca area
X-Git-Tag: v2016.01-rc1~111^2~5
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b748b24fb504b4da630c6464d6704ae7758f3732;p=platform%2Fkernel%2Fu-boot.git

ohci: Add missing cache-flush for hcca area

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>
---

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;