forge/linux-uconsole
1
0
Fork 0
Code Issues 1 Pull requests Projects Releases Packages Wiki Activity Actions

usb: dwc3: gadget: Prevent repeat pullup()

Browse source 
[ Upstream commit 69e131d1ac ]

Don't do soft-disconnect if it's previously done. Likewise, don't do
soft-connect if the device is currently connected and running. It would
break normal operation.

Currently the caller of pullup() (udc's sysfs soft_connect) only checks
if it had initiated disconnect to prevent repeating soft-disconnect. It
doesn't check for soft-connect. To be safe, let's keep the check here
regardless whether the udc core is fixed.

Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/1c1345bd66c97a9d32f77d63aaadd04b7b037143.1650593829.git.Thinh.Nguyen@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: 040f2dbd20 ("usb: dwc3: gadget: Avoid duplicate requests to enable Run/Stop")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Thinh Nguyen 2022-04-21 19:22:31 -07:00 • committed by Greg Kroah-Hartman
commit db27874477
1 changed files with 4 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

4
drivers/usb/dwc3/gadget.c
View file

@ -2127,6 +2127,10 @@ static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on)
int ret;
is_on = !!is_on;
if (dwc->pullups_connected == is_on)
return 0;
dwc->softconnect = is_on;
/*
* Per databook, when we want to stop the gadget, if a control transfer