linux-kernel - [PATCH 3.19.y-ckt 046/146] xhci: gracefully handle xhci

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Message-Id: <1434579851-1719-47-git-send-email-kamal@canonical.com>
Date:	Wed, 17 Jun 2015 15:22:31 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Joe Lawrence <joe.lawrence@...atus.com>,
	Mathias Nyman <mathias.nyman@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.19.y-ckt 046/146] xhci: gracefully handle xhci_irq dead device

3.19.8-ckt2 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Joe Lawrence <joe.lawrence@...atus.com>

commit 948fa13504f80b9765d2b753691ab94c83a10341 upstream.

If the xHCI host controller has died (ie, device removed) or suffered
other serious fatal error (STS_FATAL), then xhci_irq should handle this
condition with IRQ_HANDLED instead of -ESHUTDOWN.

Signed-off-by: Joe Lawrence <joe.lawrence@...atus.com>
Signed-off-by: Mathias Nyman <mathias.nyman@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/usb/host/xhci-ring.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 893cdf1..861a810 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -2645,7 +2645,7 @@ irqreturn_t xhci_irq(struct usb_hcd *hcd)
 		xhci_halt(xhci);
 hw_died:
 		spin_unlock(&xhci->lock);
-		return -ESHUTDOWN;
+		return IRQ_HANDLED;
 	}
 
 	/*
-- 
1.9.1

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