An USB 1.1 keyboard connected to dwc2 through a high-speed hub does not
report status until it changes. With this patch you can enable keyboard
by pressing a key while USB devices are probed. Without a keypress no
state is reported and the probe times out. We don't want to wait for a
keypress or timeout while polling for keypresses so implement an int_msg
nonblock variant that exits early on error.
Signed-off-by: Michal Suchanek <msucha...@suse.de>
---
v2: move superfluous hunk to earlier patch
---
drivers/usb/host/dwc2.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/host/dwc2.c b/drivers/usb/host/dwc2.c
index bc6166283c63..350d820a6e50 100644
--- a/drivers/usb/host/dwc2.c
+++ b/drivers/usb/host/dwc2.c
@@ -1123,7 +1123,7 @@ int _submit_int_msg(struct dwc2_priv *priv, struct
usb_device *dev,
return -ETIMEDOUT;
}
ret = _submit_bulk_msg(priv, dev, pipe, buffer, len);
- if (ret != -EAGAIN)
+ if ((ret != -EAGAIN) || nonblock)
return ret;
}
}
--
2.22.0
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