usb: gadget: aspeed: Fix EP0 stall handling

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When stalling EP0, we need to wait for an ACK interrupt,
otherwise we may get out of sync on the next setup packet
data phase. Also we need to ignore the direction when
processing that interrupt as the HW reports a potential
mismatch.

Implement this by adding a stall state to EP0. This fixes
some reported issues with mass storage and some hosts.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

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Benjamin Herrenschmidt 2019-07-26 15:05:32 +10:00 • committed by Felipe Balbi

parent d042c35eb8

commit 7e420cef90

2 changed files with 33 additions and 16 deletions

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48

drivers/usb/gadget/udc/aspeed-vhub/ep0.c

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1

drivers/usb/gadget/udc/aspeed-vhub/vhub.h

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