usb: dwc3: gadget: Check for number of TRBs prepared

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By returning the number of TRBs prepared, we know whether to execute
__dwc3_gadget_kick_transfer(). This allows us to check if we ran out of
TRBs when extra TRBs are needed for OUT transfers. It also allows us to
properly handle usb_gadget_map_request_by_dev() error.

Fixes: c6267a5163 ("usb: dwc3: gadget: align transfers to wMaxPacketSize")
Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>

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Thinh Nguyen 2020-09-24 01:21:55 -07:00 • committed by Felipe Balbi

parent 13111fcb0d

commit 490410b2e7

1 changed files with 22 additions and 15 deletions

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drivers/usb/dwc3/gadget.c

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