This is a note to let you know that I've just added the patch titled
USB: ohci-at91: fix PIO handling in relation with number of ports
to the 3.5-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-ohci-at91-fix-pio-handling-in-relation-with-number-of-ports.patch
and it can be found in the queue-3.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 6fffb77c8393151b0cf8cef1b9c2ba90587dd2e8 Mon Sep 17 00:00:00 2001
From: Nicolas Ferre <[email protected]>
Date: Wed, 29 Aug 2012 11:49:18 +0200
Subject: USB: ohci-at91: fix PIO handling in relation with number of ports
From: Nicolas Ferre <[email protected]>
commit 6fffb77c8393151b0cf8cef1b9c2ba90587dd2e8 upstream.
If the number of ports present on the SoC/board is not the maximum
and that the platform data is not filled with all data, there is
an easy way to mess the PIO setup for this interface.
This quick fix addresses mis-configuration in USB host platform data
that is common in at91 boards since commit 0ee6d1e (USB: ohci-at91:
change maximum number of ports) that did not modified the associatd
board files.
Reported-by: Klaus Falkner <[email protected]>
Signed-off-by: Nicolas Ferre <[email protected]>
Acked-by: Alan Stern <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/usb/host/ohci-at91.c | 10 ++++++++++
1 file changed, 10 insertions(+)
--- a/drivers/usb/host/ohci-at91.c
+++ b/drivers/usb/host/ohci-at91.c
@@ -570,6 +570,16 @@ static int __devinit ohci_hcd_at91_drv_p
if (pdata) {
at91_for_each_port(i) {
+ /*
+ * do not configure PIO if not in relation with
+ * real USB port on board
+ */
+ if (i >= pdata->ports) {
+ pdata->vbus_pin[i] = -EINVAL;
+ pdata->overcurrent_pin[i] = -EINVAL;
+ break;
+ }
+
if (!gpio_is_valid(pdata->vbus_pin[i]))
continue;
gpio = pdata->vbus_pin[i];
Patches currently in stable-queue which might be from [email protected]
are
queue-3.5/dmaengine-at_hdmac-check-that-each-sg-data-length-is-non-null.patch
queue-3.5/usb-ohci-at91-fix-pio-handling-in-relation-with-number-of-ports.patch
queue-3.5/dmaengine-at_hdmac-fix-comment-in-atc_prep_slave_sg.patch
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