kernel.git/drivers/usb/core/urb.c, branch linux-3.14.y

usb: define USB_SPEED_SUPER_PLUS speed for SuperSpeedPlus USB3.1 devices

2016-09-07T06:29:59Z

commit 8a1b2725a60d3267135c15e80984b4406054f650 upstream. Add a new USB_SPEED_SUPER_PLUS device speed, and make sure usb core can handle the new speed. In most cases the behaviour is the same as with USB_SPEED_SUPER SuperSpeed devices. In a few places we add a "Plus" string to inform the user of the new speed. Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman

usb: delete non-required instances of include

2014-01-08T23:01:39Z

None of these files are actually using any __init type directives and hence don't need to include . Most are just a left over from __devinit and __cpuinit removal, or simply due to code getting copied from one driver to the next. Signed-off-by: Paul Gortmaker Signed-off-by: Greg Kroah-Hartman

USB: core: correct spelling mistakes in comments and warning

2014-01-08T00:17:40Z

Signed-off-by: Rahul Bedarkar Acked-by: Randy Dunlap Signed-off-by: Greg Kroah-Hartman

USB: core: remove CONFIG_USB_DEBUG usage

2013-12-22T00:01:00Z

CONFIG_USB_DEBUG is going away, so remove the few places in the USB core that relied on them. This means that we always now do the "debug" checks for every urb submitted, which is a good idea, as who knows how many driver bugs we have been ignoring when people forget to enable this option. Also, with the overall speed of USB, doing these extra checks should not cause any additional overhead. Also, no longer announce all devices being added to the system if CONFIG_USB_DEBUG is enabled, as it's not going to be around much longer. Signed-off-by: Greg Kroah-Hartman

usb: core: allow isoc URBs for wireless devices with an interval < 6

2013-12-09T21:27:32Z

In usb_submit_urb, do not fail if an isoc URB for a wireless USB device has an interval < 6. Per WUSB spec, isoc endpoints can support values from 1-16. Valid values for interrupt URBs for wireless USB devices are still 6-16. Signed-off-by: Thomas Pugliese Signed-off-by: Greg Kroah-Hartman

usb-anchor: Delay usb_wait_anchor_empty_timeout wake up till completion is done

2013-10-11T23:33:58Z

usb_wait_anchor_empty_timeout() should wait till the completion handler has run. Both the zd1211rw driver and the uas driver (in its task mgmt) depend on the completion handler having completed when usb_wait_anchor_empty_timeout() returns, as they read state set by the completion handler after an usb_wait_anchor_empty_timeout() call. But __usb_hcd_giveback_urb() calls usb_unanchor_urb before calling the completion handler. This is necessary as the completion handler may re-submit and re-anchor the urb. But this introduces a race where the state these drivers want to read has not been set yet by the completion handler (this race is easily triggered with the uas task mgmt code). I've considered adding an anchor_count to struct urb, which would be incremented on anchor and decremented on unanchor, and then only actually do the anchor / unanchor on 0 -> 1 and 1 -> 0 transtions, combined with moving the unanchor call in hcd_giveback_urb to after calling the completion handler. But this will only work if urb's are only re-anchored to the same anchor as they were anchored to before the completion handler ran. And at least one driver re-anchors to another anchor from the completion handler (rtlwifi). So I have come up with this patch instead, which adds the ability to suspend wakeups of usb_wait_anchor_empty_timeout() waiters to the usb_anchor functionality, and uses this in __usb_hcd_giveback_urb() to delay wake-ups until the completion handler has run. Signed-off-by: Hans de Goede Acked-by: Oliver Neukum Signed-off-by: Greg Kroah-Hartman

USB: introduce usb_device_no_sg_constraint() helper

2013-08-12T18:56:16Z

Some host controllers(such as xHCI) can support building packet from discontinuous buffers, so introduce one flag and helper for this kind of host controllers, then the feature can help some applications(such as usbnet) by supporting arbitrary length of sg buffers. Acked-by: Alan Stern Signed-off-by: Ming Lei Reviewed-by: Eric Dumazet Signed-off-by: Greg Kroah-Hartman

usb: fix some scripts/kernel-doc warnings

2013-08-03T03:30:14Z

When building the htmldocs (in verbose mode), scripts/kernel-doc reports the following type of warnings: Warning(drivers/usb/core/usb.c:76): No description found for return value of 'usb_find_alt_setting' Fix them by: - adding some missing descriptions of return values - using "Return" sections for those descriptions Signed-off-by: Yacine Belkadi Signed-off-by: Greg Kroah-Hartman

USB: check sg buffer size in usb_submit_urb

2013-07-24T22:52:43Z

USB spec stats that short packet can only appear at the end of transfer. Because lost of HC(EHCI/UHCI/OHCI/...) can't build a full packet from discontinuous buffers, we introduce the limit in usb_submit_urb() to avoid such kind of bad sg buffers coming from driver. The limit might be a bit strict: - platform has iommu to do sg list mapping - some host controllers may support to build full packet from discontinuous buffers. But considered that most of HCs don't support that, and driver need work well or keep consistent on different HCs and ARCHs, we have to introduce the limit. Currently, only usbtest is reported to pass such sg buffers to HC, and other users(mass storage, usbfs) don't have the problem. We don't check it on USB wireless device, because: - wireless devices can't be attached to common USB bus(EHCI/UHCI/OHCI/...) - the max packet size of endpoint may be odd, and often can't devide 4KB which is a typical usage in usb mass storage application Reported-by: Konstantin Filatov Reported-by: Denis V. Lunev Cc: Felipe Balbi Acked-by: Alan Stern Signed-off-by: Ming Lei Signed-off-by: Greg Kroah-Hartman

USB: fix urb-poison imbalance

2013-03-25T20:48:27Z

The calls to usb_poison_urb and usb_unpoison_urb are expected to be balanced. However, if an urb that has not yet been submitted is poisoned, its reject counter will not be increased as its ep-field is NULL. A consecutive call to unpoison will thus in fact poison the urb as its reject counter will be decremented to a negative value, effectively preventing the urb from being submitted. Note that there are currently no in-kernel drivers affected by this. Cc: Alan Stern Acked-by: Alan Stern Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman