On 7/18/2014 8:09 PM, Alan Stern wrote:
On Fri, 18 Jul 2014, Amit Virdi wrote:
On 7/17/2014 8:25 PM, Alan Stern wrote:
I can't say this is actually wrong, but have you ever encountered a
situation where this would be needed? How often does anyone need to do
a multi-packet transfer over an int
On Fri, 18 Jul 2014, Amit Virdi wrote:
> On 7/17/2014 8:25 PM, Alan Stern wrote:
> > I can't say this is actually wrong, but have you ever encountered a
> > situation where this would be needed? How often does anyone need to do
> > a multi-packet transfer over an interrupt endpoint?
>
> Honestly
On Thu, 17 Jul 2014, Steve Calfee wrote:
> Hi Alan,
>
> It has been a few years since I was doing this, but here is my
> understanding. If a device descriptor says x bytes should be reserved
> (1 to 3072), the host will allocate that much bandwidth. If the sender
> sends some number of bytes betw
On 7/17/2014 8:25 PM, Alan Stern wrote:
I can't say this is actually wrong, but have you ever encountered a
situation where this would be needed? How often does anyone need to do
a multi-packet transfer over an interrupt endpoint?
Honestly, I haven't found any such real device yet. I did this
On Thu, Jul 17, 2014 at 12:32 PM, Alan Stern wrote:
> On Thu, 17 Jul 2014, Steve Calfee wrote:
>
>> Hi Alan,
>>
>> I did some testing with multi interrupt transfers some time ago. You
>> can get allocated a guaranteed 3x1024 time slot per uframe for an
>> interval of your choice on usb 2.0. So zlp
On Thu, 17 Jul 2014, Steve Calfee wrote:
> On Thu, Jul 17, 2014 at 7:55 AM, Alan Stern wrote:
> >
> > I can't say this is actually wrong, but have you ever encountered a
> > situation where this would be needed? How often does anyone need to do
> > a multi-packet transfer over an interrupt endpo
On Thu, Jul 17, 2014 at 7:55 AM, Alan Stern wrote:
>
> I can't say this is actually wrong, but have you ever encountered a
> situation where this would be needed? How often does anyone need to do
> a multi-packet transfer over an interrupt endpoint?
>
Hi Alan,
I did some testing with multi inter
On Thu, 17 Jul 2014, Amit Virdi wrote:
> Section 4.4.7.2 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 e
Hi,
On 07/17/2014 10:47 AM, Amit Virdi wrote:
> Section 4.4.7.2 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 t
Section 4.4.7.2 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 error of BOGUS transfer flags.
Signed-off-by: Am
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