| Message ID | 20220117053918.671399-1-pumahsu@google.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v4] xhci: re-initialize the HC during resume if HCE was set | expand |
On 17.1.2022 7.39, Puma Hsu wrote: > 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. > > drivers/usb/host/xhci.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c > index dc357cabb265..ab440ce8420f 100644 > --- a/drivers/usb/host/xhci.c > +++ b/drivers/usb/host/xhci.c > @@ -1146,8 +1146,8 @@ 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) { Add a debug message in case we reset due to HCE -Mathias
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index dc357cabb265..ab440ce8420f 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -1146,8 +1146,8 @@ 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) { if ((xhci->quirks & XHCI_COMP_MODE_QUIRK) && !(xhci_all_ports_seen_u0(xhci))) {
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. drivers/usb/host/xhci.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)