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path: root/target/linux/ar71xx/patches-2.6.31/110-usb-ehci-add-war-for-synopsys-hc-bug.patch
blob: a614999653b47d0f6277811e27143488b8a08e80 (plain)
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--- a/drivers/usb/host/ehci-q.c
+++ b/drivers/usb/host/ehci-q.c
@@ -1128,6 +1128,9 @@ static void end_unlink_async (struct ehc
 		ehci->reclaim = NULL;
 		start_unlink_async (ehci, next);
 	}
+
+	if (ehci->has_synopsys_hc_bug)
+		writel((u32)ehci->async->qh_dma, &ehci->regs->async_next);
 }
 
 /* makes sure the async qh will become idle */
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -126,6 +126,7 @@ struct ehci_hcd {			/* one per controlle
 	unsigned		big_endian_mmio:1;
 	unsigned		big_endian_desc:1;
 	unsigned		has_amcc_usb23:1;
+	unsigned		has_synopsys_hc_bug:1; /* Synopsys HC */
 
 	/* required for usb32 quirk */
 	#define OHCI_CTRL_HCFS          (3 << 6)