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authorAlan Stern <stern@rowland.harvard.edu>2008-05-20 16:58:58 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2008-05-29 13:59:04 -0700
commitd1f114d12bb4db3147e1b1342ae31083c5a79c84 (patch)
treeebd7c3321839b33e7483d74e340bd6ba664ecf38 /drivers/usb
parent3a31155cfff0935e4b178f3dca733d2d60d2eb8d (diff)
downloadlinux-linaro-stable-d1f114d12bb4db3147e1b1342ae31083c5a79c84.tar.gz
USB: EHCI: fix remote-wakeup regression
This patch (as1097) fixes a bug in the remote-wakeup handling in ehci-hcd. The driver currently does not keep track of whether the change-suspend feature is enabled for each port; the feature is automatically reset the first time it is read. But recent changes to the hub driver require that the feature be read at least twice in order to work properly. A bit-vector is added for storing the change-suspend feature values. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/host/ehci-hub.c6
-rw-r--r--drivers/usb/host/ehci.h2
2 files changed, 6 insertions, 2 deletions
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index d613dc9e9c05..740835bb8575 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -609,7 +609,7 @@ static int ehci_hub_control (
}
break;
case USB_PORT_FEAT_C_SUSPEND:
- /* we auto-clear this feature */
+ clear_bit(wIndex, &ehci->port_c_suspend);
break;
case USB_PORT_FEAT_POWER:
if (HCS_PPC (ehci->hcs_params))
@@ -688,7 +688,7 @@ static int ehci_hub_control (
/* resume completed? */
else if (time_after_eq(jiffies,
ehci->reset_done[wIndex])) {
- status |= 1 << USB_PORT_FEAT_C_SUSPEND;
+ set_bit(wIndex, &ehci->port_c_suspend);
ehci->reset_done[wIndex] = 0;
/* stop resume signaling */
@@ -765,6 +765,8 @@ static int ehci_hub_control (
status |= 1 << USB_PORT_FEAT_RESET;
if (temp & PORT_POWER)
status |= 1 << USB_PORT_FEAT_POWER;
+ if (test_bit(wIndex, &ehci->port_c_suspend))
+ status |= 1 << USB_PORT_FEAT_C_SUSPEND;
#ifndef VERBOSE_DEBUG
if (status & ~0xffff) /* only if wPortChange is interesting */
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index 3cb482308343..35a03095757e 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -97,6 +97,8 @@ struct ehci_hcd { /* one per controller */
dedicated to the companion controller */
unsigned long owned_ports; /* which ports are
owned by the companion during a bus suspend */
+ unsigned long port_c_suspend; /* which ports have
+ the change-suspend feature turned on */
/* per-HC memory pools (could be per-bus, but ...) */
struct dma_pool *qh_pool; /* qh per active urb */