usb: dwc2: gadget: Adjust ISOC OUT request's actual len for DDMA

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In DDMA mode if programmed ISOC OUT transfer length is not DWORD
aligned, after closing descriptor HW leaves value of 4 - (ureq->length %
4) in the RX bytes. This is caused because DMA works using 4B chunks.
Example: if length = 9 and all 9 bytes were received from the bus, after
xfercomplete rx_bytes value is 3. Hence add this value to the amount of
transferred bytes.

Signed-off-by: Vahram Aharonyan <vahrama@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

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Vahram Aharonyan 2016-11-14 19:16:46 -08:00 • committed by Felipe Balbi

parent ec01f0b231

commit 95d2b0370d

1 changed files with 4 additions and 0 deletions

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drivers/usb/dwc2/gadget.c

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