linux-kernel - [PATCH 11/11] ehci-dbgp,ehci: Allow dbpg to work with suspend/resume

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Message-Id: <1250800798-31559-12-git-send-email-jason.wessel@windriver.com>
Date:	Thu, 20 Aug 2009 15:39:58 -0500
From:	Jason Wessel <jason.wessel@...driver.com>
To:	gregkh@...e.de
Cc:	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	Jason Wessel <jason.wessel@...driver.com>,
	Alan Stern <stern@...land.harvard.edu>,
	dbrownell@...rs.sourceforge.net, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Yinghai Lu <yinghai@...nel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: [PATCH 11/11] ehci-dbgp,ehci: Allow dbpg to work with suspend/resume

In order for the dbgp driver to survive suspend/resume, on every ehci
resume operation the debug controller must get re-initialized.

Signed-off-by: Jason Wessel <jason.wessel@...driver.com>
Cc: Greg KH <gregkh@...e.de>
Cc: Alan Stern <stern@...land.harvard.edu>
Cc: dbrownell@...rs.sourceforge.net
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Yinghai Lu <yinghai@...nel.org>
Cc: "Eric W. Biederman" <ebiederm@...ssion.com>
---
 drivers/usb/host/ehci-hub.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index 452380e..84b972a 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -204,6 +204,13 @@ static int ehci_bus_resume (struct usb_hcd *hcd)
 		return -ESHUTDOWN;
 	}
 
+	if (unlikely(ehci->debug)) {
+		if (ehci->debug && !dbgp_reset_prep())
+			ehci->debug = NULL;
+		else
+			dbgp_external_startup();
+	}
+
 	/* Ideally and we've got a real resume here, and no port's power
 	 * was lost.  (For PCI, that means Vaux was maintained.)  But we
 	 * could instead be restoring a swsusp snapshot -- so that BIOS was
-- 
1.6.3.1.9.g95405b

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