xhci: print warning when HCE was set

When HCE(Host Controller Error) is set, it means that the xhci hardware
controller has an error at this time, but the current xhci driver
software does not log this event.

By adding an HCE event detection in the xhci interrupt processing
interface, a warning log is output to the system, which is convenient
for system device status tracking.

Signed-off-by: Longfang Liu <liulongfang@huawei.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20221130091944.2171610-2-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index ad81e9a508b14b1bfd231e79db06a20d06699b25..f6af479188e8f6edf68287f032b2cca624df612e 100644 (file)
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -3031,6 +3031,11 @@ irqreturn_t xhci_irq(struct usb_hcd *hcd)
        if (!(status & STS_EINT))
                goto out;
 
+       if (status & STS_HCE) {
+               xhci_warn(xhci, "WARNING: Host Controller Error\n");
+               goto out;
+       }
+
        if (status & STS_FATAL) {
                xhci_warn(xhci, "WARNING: Host System Error\n");
                xhci_halt(xhci);