diff options
| author | Amit Virdi <amit.virdi@st.com> | 2014-07-21 10:46:18 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-22 16:30:58 -0700 |
| commit | 9672f0feb566423deb245032a1c9a7a14dacb6eb (patch) | |
| tree | 8524beac8a2737efb47527ed06e1e43955d13e3d /drivers/usb | |
| parent | b1bd3f1a398ef27dd09a594c38dde34472b453af (diff) | |
| download | blackbird-obmc-linux-9672f0feb566423deb245032a1c9a7a14dacb6eb.tar.gz blackbird-obmc-linux-9672f0feb566423deb245032a1c9a7a14dacb6eb.zip | |
usb: core: allow zero packet flag for interrupt urbs
Section 4.4.7.2 "Interrupt Transfer Bandwidth Requirements" of the USB3.0 spec
says:
A zero-length data payload is a valid transfer and may be useful for
some implementations.
So, extend the logic of allowing URB_ZERO_PACKET to interrupt urbs too.
Otherwise, the kernel throws warning of BOGUS transfer flags.
Signed-off-by: Amit Virdi <amit.virdi@st.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/core/urb.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c index 991386ceb4ec..c9e8ee81b6b7 100644 --- a/drivers/usb/core/urb.c +++ b/drivers/usb/core/urb.c @@ -454,6 +454,7 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags) URB_FREE_BUFFER); switch (xfertype) { case USB_ENDPOINT_XFER_BULK: + case USB_ENDPOINT_XFER_INT: if (is_out) allowed |= URB_ZERO_PACKET; /* FALLTHROUGH */ |
