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Date:	Mon, 21 Jul 2014 10:46:18 +0530
From:	Amit Virdi <>
To:	<>, <>
Cc:	<>, <>,
	<>, <>,
	<>, <>,
	Amit Virdi <>
Subject: [PATCH V2] usb: core: allow zero packet flag for interrupt urbs

Section "Interrupt Transfer Bandwidth Requirements" of the USB3.0 spec
	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 <>
Acked-by: Hans de Goede <>
 drivers/usb/core/urb.c | 1 +
 1 file changed, 1 insertion(+)

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)
 	switch (xfertype) {
 		if (is_out)
 			allowed |= URB_ZERO_PACKET;

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