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usb: dwc3: xilinx: add shutdown callback

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Adds a shutdown callback to ensure that the XHCI stack is properly
shutdown in reboot/shutdown path.

In kexec flow, kernel_restart_prepare() performs actions necessary
to prepare the system for a restart and invokes device_shutdown. To
ensure proper shutdown attach the dwc3 shutdown implementation which
mirrors the remove method.

$ kexec -e

<snip>
xhci-hcd xhci-hcd.0.auto: remove, state 1
usb usb1: USB disconnect, device number 1
usb 1-1: USB disconnect, device number 6
xhci-hcd xhci-hcd.0.auto: USB bus 1 deregistered
kexec_core: Starting new kernel

Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@amd.com>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/1748977771-714153-1-git-send-email-radhey.shyam.pandey@amd.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Radhey Shyam Pandey 2025-06-04 00:39:31 +05:30 committed by Greg Kroah-Hartman
parent 58992bf328
commit 70627bf82e
1 changed files with 1 additions and 0 deletions
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1
drivers/usb/dwc3/dwc3-xilinx.c
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@ -422,6 +422,7 @@ static const struct dev_pm_ops dwc3_xlnx_dev_pm_ops = {
static struct platform_driver dwc3_xlnx_driver = {
.probe = dwc3_xlnx_probe,
.remove = dwc3_xlnx_remove,
.shutdown = dwc3_xlnx_remove,
.driver = {
.name = "dwc3-xilinx",
.of_match_table = dwc3_xlnx_of_match,