linux-kernel - [PATCH v2] usb/host/ehci-hub: Fix the issue EG20T USB host controller has long resuming time, when pen drive is attached.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1342061617-5630-1-git-send-email-tomoya.rohm@gmail.com>
Date:	Thu, 12 Jul 2012 11:53:37 +0900
From:	Tomoya MORINAGA <tomoya.rohm@...il.com>
To:	Alan Stern <stern@...land.harvard.edu>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	Tomoya MORINAGA <tomoya.rohm@...il.com>
Subject: [PATCH v2] usb/host/ehci-hub: Fix the issue EG20T USB host controller has long resuming time, when pen drive is attached.

Intel EG20T USB host controller does not send SOF in resuming time after suspending, if the FLR bit was not cleared. When pen drive is attached, the controller has a long resuming time to try re-connect it. This patch clear the FLR bit in suspending time for fixing the issue.

Signed-off-by: Tomoya MORINAGA <tomoya.rohm@...il.com>
---
v2: Update comments from Alan Stern
	Add patch description
	Always clear the STS_FLR flag.
---
 drivers/usb/host/ehci-hub.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index fc9e7cc..818a2f1 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -318,6 +318,7 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
 	ehci_readl(ehci, &ehci->regs->intr_enable);
 
 	ehci->next_statechange = jiffies + msecs_to_jiffies(10);
+	ehci_writel(ehci, STS_FLR, &ehci->regs->status);
 	spin_unlock_irq (&ehci->lock);
 
 	/* ehci_work() may have re-enabled the watchdog timer, which we do not
-- 
1.7.4.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/