This is a note to let you know that I've just added the patch titled
USB: echi-dbgp: increase the controller wait time to come out of halt.
to the 3.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-echi-dbgp-increase-the-controller-wait-time-to-come-out-of-halt.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From f96a4216e85050c0a9d41a41ecb0ae9d8e39b509 Mon Sep 17 00:00:00 2001
From: Colin Ian King <[email protected]>
Date: Mon, 30 Jul 2012 16:06:42 +0100
Subject: USB: echi-dbgp: increase the controller wait time to come out of halt.
From: Colin Ian King <[email protected]>
commit f96a4216e85050c0a9d41a41ecb0ae9d8e39b509 upstream.
The default 10 microsecond delay for the controller to come out of
halt in dbgp_ehci_startup is too short, so increase it to 1 millisecond.
This is based on emperical testing on various USB debug ports on
modern machines such as a Lenovo X220i and an Ivybridge development
platform that needed to wait ~450-950 microseconds.
Signed-off-by: Colin Ian King <[email protected]>
Signed-off-by: Jason Wessel <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/usb/early/ehci-dbgp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/usb/early/ehci-dbgp.c
+++ b/drivers/usb/early/ehci-dbgp.c
@@ -450,7 +450,7 @@ static int dbgp_ehci_startup(void)
writel(FLAG_CF, &ehci_regs->configured_flag);
/* Wait until the controller is no longer halted */
- loop = 10;
+ loop = 1000;
do {
status = readl(&ehci_regs->status);
if (!(status & STS_HALT))
Patches currently in stable-queue which might be from [email protected]
are
queue-3.0/usb-echi-dbgp-increase-the-controller-wait-time-to-come-out-of-halt.patch
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