fotg210-udc: Fix DMA on EP0 for length > max packet size

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[ Upstream commit 755915fc28 ]

For a 75 Byte request, it would send the first 64 separately, then detect
that the remaining 11 Byte fit into a single DMA, but due to this bug set
the length to the original 75 Bytes. This leads to a DMA failure (which is
ignored...) and the request completes without the remaining bytes having
been sent.

Fixes: b84a8dee23 ("usb: gadget: add Faraday fotg210_udc driver")
Signed-off-by: Fabian Vogt <fabian@ritter-vogt.de>
Link: https://lore.kernel.org/r/20210324141115.9384-2-fabian@ritter-vogt.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Fabian Vogt 2021-03-24 15:11:09 +01:00 • committed by Greg Kroah-Hartman

parent 1f50392650

commit 01c66e8340

1 changed files with 1 additions and 1 deletions

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drivers/usb/gadget/udc/fotg210-udc.c

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