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From: Peter Robinson <pbrobinson@gmail.com>
Date: Thu, 3 May 2012 20:27:11 +0100
Subject: [PATCH] ARM: tegra: usb no reset

Patch for disconnect issues with storage attached to a
 tegra-ehci controller
---
 drivers/usb/core/hub.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 674c262907d9..d3e4c73d56a2 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -5041,6 +5041,13 @@ static void hub_events(void)
 				(u16) hub->change_bits[0],
 				(u16) hub->event_bits[0]);
 
+		/* Don't disconnect USB-SATA on TrimSlice */
+		if (strcmp(dev_name(hdev->bus->controller), "tegra-ehci.0") == 0) {
+			if ((hdev->state == 7) && (hub->change_bits[0] == 0) &&
+			    (hub->event_bits[0] == 0x2))
+				hub->event_bits[0] = 0;
+		}
+
 		/* Lock the device, then check to see if we were
 		 * disconnected while waiting for the lock to succeed. */
 		usb_lock_device(hdev);
-- 
2.1.0