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USB fixes for 3.16-rc6

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Here are 2 USB patches that resolve some reported issues, one with an
 odd HUB, and one in the chipidea driver.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-3.16-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here are two USB patches that resolve some reported issues, one with
  an odd HUB, and one in the chipidea driver"

* tag 'usb-3.16-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: Check if port status is equal to RxDetect
  usb: chipidea: udc: Disable auto ZLP generation on ep0
This commit is contained in:
Linus Torvalds 2014-07-20 20:44:18 -07:00
commit caa7c4e172
2 changed files with 21 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/usb/chipidea/udc.c
View File

@ -1169,8 +1169,8 @@ static int ep_enable(struct usb_ep *ep,
if (hwep->type == USB_ENDPOINT_XFER_CONTROL)
cap |= QH_IOS;
if (hwep->num)
cap |= QH_ZLT;
cap |= QH_ZLT;
cap |= (hwep->ep.maxpacket << __ffs(QH_MAX_PKT)) & QH_MAX_PKT;
/*
* For ISO-TX, we set mult at QH as the largest value, and use

19
drivers/usb/core/hub.c
View File

@ -889,6 +889,25 @@ static int hub_usb3_port_disable(struct usb_hub *hub, int port1)
if (!hub_is_superspeed(hub->hdev))
return -EINVAL;
ret = hub_port_status(hub, port1, &portstatus, &portchange);
if (ret < 0)
return ret;
/*
* USB controller Advanced Micro Devices, Inc. [AMD] FCH USB XHCI
* Controller [1022:7814] will have spurious result making the following
* usb 3.0 device hotplugging route to the 2.0 root hub and recognized
* as high-speed device if we set the usb 3.0 port link state to
* Disabled. Since it's already in USB_SS_PORT_LS_RX_DETECT state, we
* check the state here to avoid the bug.
*/
if ((portstatus & USB_PORT_STAT_LINK_STATE) ==
USB_SS_PORT_LS_RX_DETECT) {
dev_dbg(&hub->ports[port1 - 1]->dev,
"Not disabling port; link state is RxDetect\n");
return ret;
}
ret = hub_set_port_link_state(hub, port1, USB_SS_PORT_LS_SS_DISABLED);
if (ret)
return ret;