diff options
| author | Thinh Nguyen <Thinh.Nguyen@synopsys.com> | 2022-04-21 19:33:56 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-22 15:39:12 +0200 |
| commit | f4fd84ae0765a80494b28c43b756a95100351a94 (patch) | |
| tree | d7ecefdd6611a08f730bcb005e0e4be411b74f77 /drivers/usb | |
| parent | bf95c4d4630c7a2c16e7b424fdea5177d9ce0864 (diff) | |
usb: dwc3: core: Only handle soft-reset in DCTL
Make sure not to set run_stop bit or link state change request while
initiating soft-reset. Register read-modify-write operation may
unintentionally start the controller before the initialization completes
with its previous DCTL value, which can cause initialization failure.
Fixes: f59dcab17629 ("usb: dwc3: core: improve reset sequence")
Cc: <stable@vger.kernel.org>
Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/6aecbd78328f102003d40ccf18ceeebd411d3703.1650594792.git.Thinh.Nguyen@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/dwc3/core.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 1ca9dae57855..d28cd1a6709b 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -274,7 +274,8 @@ int dwc3_core_soft_reset(struct dwc3 *dwc) reg = dwc3_readl(dwc->regs, DWC3_DCTL); reg |= DWC3_DCTL_CSFTRST; - dwc3_writel(dwc->regs, DWC3_DCTL, reg); + reg &= ~DWC3_DCTL_RUN_STOP; + dwc3_gadget_dctl_write_safe(dwc, reg); /* * For DWC_usb31 controller 1.90a and later, the DCTL.CSFRST bit |