6.6-stable review patch. If anyone has any objections, please let me know.
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From: Jisheng Zhang jszhang@kernel.org
[ Upstream commit b6ebcfdcac40a27953f052e4269ce75a18825ffc ]
dwc2 on most platforms needs phy controller, clock and power supply. All of them must be enabled/activated to properly operate. If dwc2 is configured as peripheral mode, then all the above three hardware resources are disabled at the end of the probe:
/* Gadget code manages lowlevel hw on its own */ if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) dwc2_lowlevel_hw_disable(hsotg);
But dwc2_driver_shutdown() tries to disable the interrupts on HW IP level. This would result in hang during shutdown if dwc2 is configured as peripheral mode.
Fix this hang by only disable and sync irq when lowlevel hw is enabled.
Fixes: 4fdf228cdf69 ("usb: dwc2: Fix shutdown callback in platform") Signed-off-by: Jisheng Zhang jszhang@kernel.org Link: https://patch.msgid.link/20251104002503.17158-2-jszhang@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/usb/dwc2/platform.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c index 79ce88b5f07d9..fad6f68f86bd6 100644 --- a/drivers/usb/dwc2/platform.c +++ b/drivers/usb/dwc2/platform.c @@ -369,11 +369,11 @@ static void dwc2_driver_shutdown(struct platform_device *dev) { struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);
- dwc2_disable_global_interrupts(hsotg); - synchronize_irq(hsotg->irq); - - if (hsotg->ll_hw_enabled) + if (hsotg->ll_hw_enabled) { + dwc2_disable_global_interrupts(hsotg); + synchronize_irq(hsotg->irq); dwc2_lowlevel_hw_disable(hsotg); + } }
/**