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FROMGIT: usb: dwc3: gadget: Prevent repeat pullup()

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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>

(cherry picked from commit 69e131d1ac4e52a59ec181ab4f8aa8c48cd8fb64 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git/ usb-next)

BUG: 238836938
Change-Id: Ibcb208581948132cfe4736381a67fea33026c372
Signed-off-by: Udipto Goswami <quic_ugoswami@quicinc.com>
This commit is contained in:
Thinh Nguyen
2022-04-21 19:22:31 -07:00
committed by Udipto Goswami
parent 8de633b735
commit c5eb0edfde
1 changed files with 4 additions and 0 deletions
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4
drivers/usb/dwc3/gadget.c
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@@ -2471,6 +2471,10 @@ static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on)
int ret; int ret;
is_on = !!is_on; is_on = !!is_on;
if (dwc->pullups_connected == is_on)
return 0;
vdwc->softconnect = is_on; vdwc->softconnect = is_on;
/* /*