Messages in this thread Patch in this message | | | Date | Wed, 19 Jan 2022 14:40:13 +0800 | Subject | [PATCH v5] xhci: re-initialize the HC during resume if HCE was set | From | Puma Hsu <> |
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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> --- v2: Follow Sergey Shtylyov <s.shtylyov@omp.ru>'s comment. v3: Add stable@vger.kernel.org for stable release. v4: Refine the commit message. v5: Add a debug log. Follow Mathias Nyman <mathias.nyman@linux.intel.com>'s comment.
drivers/usb/host/xhci.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index dc357cabb265..41f594f0f73f 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -1146,8 +1146,10 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated) temp = readl(&xhci->op_regs->status); } - /* If restore operation fails, re-initialize the HC during resume */ - if ((temp & STS_SRE) || hibernated) { + /* If restore operation fails or HC error is detected, re-initialize the HC during resume */ + if ((temp & (STS_SRE | STS_HCE)) || hibernated) { + xhci_warn(xhci, "re-initialize HC during resume, USBSTS:%s\n", + xhci_decode_usbsts(str, temp)); if ((xhci->quirks & XHCI_COMP_MODE_QUIRK) && !(xhci_all_ports_seen_u0(xhci))) { -- 2.34.1.703.g22d0c6ccf7-goog
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