diff mbox series

[U-Boot,v2,9/9] dwc2: use the nonblock argument in submit_int_msg

Message ID 7059dcc94dcd0d0b9d8428afd09651327c332e6f.1562090082.git.msuchanek@suse.de
State Superseded
Delegated to: Marek Vasut
Headers show
Series [U-Boot,v2,1/9] usb: r8a66597: return -ENOTSUPP from unimplemented submit_int_msg | expand

Commit Message

Michal Suchánek July 2, 2019, 5:55 p.m. UTC 
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 <msuchanek@suse.de>
---
v2: move superfluous hunk to earlier patch
---
 drivers/usb/host/dwc2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/usb/host/dwc2.c b/drivers/usb/host/dwc2.c
index b4121a49b805..78829d56199c 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;
 	}
 }