| Message ID | 1384867065-22820-1-git-send-email-luis.henriques@canonical.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 86c7421..b5503b0 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -1142,6 +1142,11 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type) clear_port_feature(hub->hdev, port1, USB_PORT_FEAT_C_ENABLE); } + if (portchange & USB_PORT_STAT_C_RESET) { + need_debounce_delay = true; + clear_port_feature(hub->hdev, port1, + USB_PORT_FEAT_C_RESET); + } if ((portchange & USB_PORT_STAT_C_BH_RESET) && hub_is_superspeed(hub->hdev)) { need_debounce_delay = true;
This is a note to let you know that I have just added a patch titled usb: hub: Clear Port Reset Change during init/resume to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.5.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ------ From 9ac0c5f84940e2ee260b25751ce5d650cfe1cdba Mon Sep 17 00:00:00 2001 From: Julius Werner <jwerner@chromium.org> Date: Tue, 15 Oct 2013 17:45:00 -0700 Subject: usb: hub: Clear Port Reset Change during init/resume commit e92aee330837e4911553761490a8fb843f2053a6 upstream. This patch adds the Port Reset Change flag to the set of bits that are preemptively cleared on init/resume of a hub. In theory this bit should never be set unexpectedly... in practice it can still happen if BIOS, SMM or ACPI code plays around with USB devices without cleaning up correctly. This is especially dangerous for XHCI root hubs, which don't generate any more Port Status Change Events until all change bits are cleared, so this is a good precaution to have (similar to how it's already done for the Warm Port Reset Change flag). Signed-off-by: Julius Werner <jwerner@chromium.org> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> [ luis: backported to 3.5: - adjusted context - replaced usb_clear_port_feature() by clear_port_feature() ] Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- drivers/usb/core/hub.c | 5 +++++ 1 file changed, 5 insertions(+) -- 1.8.3.2