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usb: xhci: Avoid showing warnings for dying controller

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When a USB4 dock is unplugged from a system it won't respond to ring
events. The PCI core handles the surprise removal event and notifies
all PCI drivers. The XHCI PCI driver sets a flag that the device is
being removed, and when the device stops responding a flag is also
added to indicate it's dying.

When that flag is set don't bother to show warnings about a missing
controller.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20250717073107.488599-3-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mario Limonciello 2025-07-17 10:31:06 +03:00 committed by Greg Kroah-Hartman
parent 4b9c60e440
commit 65fc0fc137
1 changed files with 4 additions and 2 deletions
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6
drivers/usb/host/xhci.c
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@ -121,7 +121,8 @@ int xhci_halt(struct xhci_hcd *xhci)
ret = xhci_handshake(&xhci->op_regs->status,
STS_HALT, STS_HALT, XHCI_MAX_HALT_USEC);
if (ret) {
xhci_warn(xhci, "Host halt failed, %d\n", ret);
if (!(xhci->xhc_state & XHCI_STATE_DYING))
xhci_warn(xhci, "Host halt failed, %d\n", ret);
return ret;
}
@ -180,7 +181,8 @@ int xhci_reset(struct xhci_hcd *xhci, u64 timeout_us)
state = readl(&xhci->op_regs->status);
if (state == ~(u32)0) {
xhci_warn(xhci, "Host not accessible, reset failed.\n");
if (!(xhci->xhc_state & XHCI_STATE_DYING))
xhci_warn(xhci, "Host not accessible, reset failed.\n");
return -ENODEV;
}