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xhci: re-initialize the HC during resume if HCE was set

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commit 8b328f8002 upstream.

When HCE(Host Controller Error) is set, it means an internal
error condition has been detected. Software needs to re-initialize
the HC, so add this check in xhci resume.

Cc: stable@vger.kernel.org
Signed-off-by: Puma Hsu <pumahsu@google.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20220215123320.1253947-2-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Puma Hsu 2022-02-15 14:33:19 +02:00 committed by Greg Kroah-Hartman
parent 88f69c6444
commit c8b38e5574
1 changed files with 13 additions and 6 deletions
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19
drivers/usb/host/xhci.c
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@ -1091,6 +1091,7 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
int retval = 0;
bool comp_timer_running = false;
bool pending_portevent = false;
bool reinit_xhc = false;
if (!hcd->state)
return 0;
@ -1107,10 +1108,11 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
set_bit(HCD_FLAG_HW_ACCESSIBLE, &xhci->shared_hcd->flags);
spin_lock_irq(&xhci->lock);
if ((xhci->quirks & XHCI_RESET_ON_RESUME) || xhci->broken_suspend)
hibernated = true;
if (!hibernated) {
if (hibernated || xhci->quirks & XHCI_RESET_ON_RESUME || xhci->broken_suspend)
reinit_xhc = true;
if (!reinit_xhc) {
/*
* Some controllers might lose power during suspend, so wait
* for controller not ready bit to clear, just as in xHC init.
@ -1143,12 +1145,17 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
spin_unlock_irq(&xhci->lock);
return -ETIMEDOUT;
}
temp = readl(&xhci->op_regs->status);
}
/* If restore operation fails, re-initialize the HC during resume */
if ((temp & STS_SRE) || hibernated) {
temp = readl(&xhci->op_regs->status);
/* re-initialize the HC on Restore Error, or Host Controller Error */
if (temp & (STS_SRE | STS_HCE)) {
reinit_xhc = true;
xhci_warn(xhci, "xHC error in resume, USBSTS 0x%x, Reinit\n", temp);
}
if (reinit_xhc) {
if ((xhci->quirks & XHCI_COMP_MODE_QUIRK) &&
!(xhci_all_ports_seen_u0(xhci))) {
del_timer_sync(&xhci->comp_mode_recovery_timer);