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| author | Krishna Kurapati <quic_kriskura@quicinc.com> | 2023-05-10 13:22:51 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-05-13 19:00:18 +0900 |
| commit | 813f44d57e19ccaa7330e829bd913515be42719d (patch) | |
| tree | 137d6b556e282810387405935ff637ee88f8a0e7 /drivers/usb/dwc3 | |
| parent | ada050c69108bc34be13ecc11f7fad0f20ebadc4 (diff) | |
| download | linux-stable-813f44d57e19ccaa7330e829bd913515be42719d.tar.gz linux-stable-813f44d57e19ccaa7330e829bd913515be42719d.tar.bz2 linux-stable-813f44d57e19ccaa7330e829bd913515be42719d.zip | |
usb: dwc3: gadget: Bail out in pullup if soft reset timeout happens
If the core soft reset timeout happens, avoid setting up event
buffers and starting gadget as the writes to these registers
may not reflect when in reset and setting the run stop bit
can lead the controller to access wrong event buffer address
resulting in a crash.
Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20230510075252.31023-2-quic_kriskura@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/dwc3')
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 7163d5d0eea0..5965796bc5d5 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2746,13 +2746,16 @@ static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) * device-initiated disconnect requires a core soft reset * (DCTL.CSftRst) before enabling the run/stop bit. */ - dwc3_core_soft_reset(dwc); + ret = dwc3_core_soft_reset(dwc); + if (ret) + goto done; dwc3_event_buffers_setup(dwc); __dwc3_gadget_start(dwc); ret = dwc3_gadget_run_stop(dwc, true); } +done: pm_runtime_put(dwc->dev); return ret; |