Re: [PATCH v2] USB: Gadget, fsl_qe: Fixed send of zero byte packets

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Hello, I wrote:

Some usb serial host drivers expect a short packet before they forward
the data to the application. This is caused by them trying to read more
than one packet at a time. So when the gadget sends an exact multiple
of the maximum packet size, it should append a zero-length packet.
The gadget driver for fsl_qe was not handling this case correctly.
This patch adds sending of a null packet if it is the last packet of
a frame and the request length is USB_EP0_MAX_SIZE (64 Byte).

See also commit 2e25134122c25ebb0679b4bbd536fb46c669f9d7

   Linus has asked to also specify

   Oops, didn't finish the sentence, here's the continuation:
"... the commit summary in parens".

Signed-off-by: Stefan Bigler <stefan.bigler@xxxxxxxxxxx>
Signed-off-by: Holger Brunck <holger.brunck@xxxxxxxxxxx>
Cc: Li Yang <leoli@xxxxxxxxxxxxx>
Cc: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>

WBR, Sergei

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