On some SoC's like SA8295P where the tertiary controller is host-only capable, GEVTADDRHI/LO, GEVTSIZ, GEVTCOUNT registers are not accessible. Trying to setup them up during core_init leads to a crash. For DRD/Peripheral supported controllers, event buffer setup is done again in gadget_pullup. Skip setup or cleanup of event buffers if controller is host-only capable. Signed-off-by: Krishna Kurapati <quic_kriskura@xxxxxxxxxxx> --- Link to v5: https://lore.kernel.org/all/20230310163420.7582-4-quic_kriskura@xxxxxxxxxxx/ drivers/usb/dwc3/core.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 567ae79389a1..2964bcaa0a27 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -839,7 +839,11 @@ static void dwc3_clk_disable(struct dwc3 *dwc) static void dwc3_core_exit(struct dwc3 *dwc) { - dwc3_event_buffers_cleanup(dwc); + unsigned int hw_mode; + + hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0); + if (hw_mode != DWC3_GHWPARAMS0_MODE_HOST) + dwc3_event_buffers_cleanup(dwc); usb_phy_set_suspend(dwc->usb2_phy, 1); usb_phy_set_suspend(dwc->usb3_phy, 1); @@ -1176,10 +1180,12 @@ static int dwc3_core_init(struct dwc3 *dwc) if (ret < 0) goto err3; - ret = dwc3_event_buffers_setup(dwc); - if (ret) { - dev_err(dwc->dev, "failed to setup event buffers\n"); - goto err4; + if (hw_mode != DWC3_GHWPARAMS0_MODE_HOST) { + ret = dwc3_event_buffers_setup(dwc); + if (ret) { + dev_err(dwc->dev, "failed to setup event buffers\n"); + goto err4; + } } /* @@ -2002,7 +2008,9 @@ static int dwc3_probe(struct platform_device *pdev) err5: dwc3_debugfs_exit(dwc); - dwc3_event_buffers_cleanup(dwc); + + if (hw_mode != DWC3_GHWPARAMS0_MODE_HOST) + dwc3_event_buffers_cleanup(dwc); usb_phy_set_suspend(dwc->usb2_phy, 1); usb_phy_set_suspend(dwc->usb3_phy, 1); -- 2.40.0
