diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-07-20 20:44:18 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-07-20 20:44:18 -0700 |
| commit | caa7c4e17259e1ffe28096c9a08409ae939e7c79 (patch) | |
| tree | 63eff3cc335511e97cddaabd1eedeeb15416c28f | |
| parent | f47d5bb02e6738b80391b1859f0364819d7ab0c8 (diff) | |
| parent | bb86cf569bbd7ad4dce581a37c7fbd748057e9dc (diff) | |
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
| -rw-r--r-- | drivers/usb/chipidea/udc.c | 4 | ||||
| -rw-r--r-- | drivers/usb/core/hub.c | 19 |
2 files changed, 21 insertions, 2 deletions
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c index 9d2b673f90e..b8125aa64ad 100644 --- a/drivers/usb/chipidea/udc.c +++ b/drivers/usb/chipidea/udc.c @@ -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 diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 21b99b4b408..0e950ad8cb2 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -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; |