From: Mathias Nyman mathias.nyman@linux.intel.com
commit 72ae194704da212e2ec312ab182a96799d070755 upstream.
Bail out early if the xHC host needs to be reset at resume but driver can't access xHC PCI registers.
If xhci driver already fails to reset the controller then there is no point in attempting to free, re-initialize, re-allocate and re-start the host. If failure to access the host is detected later, failing the resume, xhci interrupts will be double freed when remove is called.
Signed-off-by: Mathias Nyman mathias.nyman@linux.intel.com Link: https://lore.kernel.org/r/20200312144517.1593-2-mathias.nyman@linux.intel.co... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org [sudip: adjust context] Signed-off-by: Sudip Mukherjee sudipm.mukherjee@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/host/xhci.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -1111,8 +1111,10 @@ int xhci_resume(struct xhci_hcd *xhci, b
xhci_dbg(xhci, "Stop HCD\n"); xhci_halt(xhci); - xhci_reset(xhci); + retval = xhci_reset(xhci); spin_unlock_irq(&xhci->lock); + if (retval) + return retval; xhci_cleanup_msix(xhci);
xhci_dbg(xhci, "// Disabling event ring interrupts\n");