usb: dwc2: gadget: fix zero length packet transfers

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According to programming guide, zero length packet should be
programmed on its own and should not be counted in DIEPTSIZ.PktCnt
with other packets.

For ep0, this is the zlp for DATA IN stage (if required) and not for
the STATUS stage.

Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Acked-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

...

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Mian Yousaf Kaukab 2015-01-09 13:38:59 +01:00 • committed by Felipe Balbi

parent fe0b94abcd

commit f71b5e2533

1 changed files with 22 additions and 29 deletions

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51

drivers/usb/dwc2/gadget.c

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