diff options
| author | Thierry Reding <treding@nvidia.com> | 2020-04-17 19:05:37 +0200 |
|---|---|---|
| committer | Felipe Balbi <balbi@kernel.org> | 2020-05-09 11:05:08 +0300 |
| commit | 0534d40160cb9505073b0ecf5e7210daee319a66 (patch) | |
| tree | 4ee0827215ebfb2584452a7048fe1e83d87bea95 /drivers/usb | |
| parent | ccaef7e6e354fb65758eaddd3eae8065a8b3e295 (diff) | |
usb: gadget: tegra-xudc: Fix idle suspend/resume
When the XUDC device is idle (i.e. powergated), care must be taken not
to access any registers because that would lead to a crash.
Move the call to tegra_xudc_device_mode_off() into the same conditional
as the tegra_xudc_powergate() call to make sure we only force device
mode off if the XUDC is actually powered up.
Fixes: 49db427232fe ("usb: gadget: Add UDC driver for tegra XUSB device mode controller")
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/gadget/udc/tegra-xudc.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/usb/gadget/udc/tegra-xudc.c b/drivers/usb/gadget/udc/tegra-xudc.c index 52a6add961f4..dfabc54cdc27 100644 --- a/drivers/usb/gadget/udc/tegra-xudc.c +++ b/drivers/usb/gadget/udc/tegra-xudc.c @@ -3840,11 +3840,11 @@ static int __maybe_unused tegra_xudc_suspend(struct device *dev) flush_work(&xudc->usb_role_sw_work); - /* Forcibly disconnect before powergating. */ - tegra_xudc_device_mode_off(xudc); - - if (!pm_runtime_status_suspended(dev)) + if (!pm_runtime_status_suspended(dev)) { + /* Forcibly disconnect before powergating. */ + tegra_xudc_device_mode_off(xudc); tegra_xudc_powergate(xudc); + } pm_runtime_disable(dev); |