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| author | Jisheng Zhang <jszhang@kernel.org> | 2023-06-28 00:20:18 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-07-25 17:39:58 +0200 |
| commit | e835c0a4e23c38531dcee5ef77e8d1cf462658c7 (patch) | |
| tree | 966be6863702c831e125ded971154d0fc5edf185 /drivers | |
| parent | 71c47ad8920ef19d6545202191252a50c03aca30 (diff) | |
| download | linux-stable-e835c0a4e23c38531dcee5ef77e8d1cf462658c7.tar.gz linux-stable-e835c0a4e23c38531dcee5ef77e8d1cf462658c7.tar.bz2 linux-stable-e835c0a4e23c38531dcee5ef77e8d1cf462658c7.zip | |
usb: dwc3: don't reset device side if dwc3 was configured as host-only
Commit c4a5153e87fd ("usb: dwc3: core: Power-off core/PHYs on
system_suspend in host mode") replaces check for HOST only dr_mode with
current_dr_role. But during booting, the current_dr_role isn't
initialized, thus the device side reset is always issued even if dwc3
was configured as host-only. What's more, on some platforms with host
only dwc3, aways issuing device side reset by accessing device register
block can cause kernel panic.
Fixes: c4a5153e87fd ("usb: dwc3: core: Power-off core/PHYs on system_suspend in host mode")
Cc: stable <stable@kernel.org>
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20230627162018.739-1-jszhang@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/dwc3/core.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index f6689b731718..e719e772f926 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -277,9 +277,9 @@ int dwc3_core_soft_reset(struct dwc3 *dwc) /* * We're resetting only the device side because, if we're in host mode, * XHCI driver will reset the host block. If dwc3 was configured for - * host-only mode, then we can return early. + * host-only mode or current role is host, then we can return early. */ - if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_HOST) + if (dwc->dr_mode == USB_DR_MODE_HOST || dwc->current_dr_role == DWC3_GCTL_PRTCAP_HOST) return 0; reg = dwc3_readl(dwc->regs, DWC3_DCTL); |