• Andiry Xu's avatar
    xHCI: keep track of ports being resumed and indicate in hub_status_data · f370b996
    Andiry Xu authored
    This commit adds a bit-array to xhci bus_state for keeping track of
    which ports are undergoing a resume transition. If any of the bits
    are set when xhci_hub_status_data() is called, the routine will return
    a non-zero value even if no ports have any status changes pending.
    This will allow usbcore to handle races between root-hub suspend and
    port wakeup.
    
    This patch should be backported to kernels as old as 3.4, that contain
    the commit 879d38e6 "USB: fix race
    between root-hub suspend and remote wakeup".
    Signed-off-by: default avatarAndiry Xu <andiry.xu@amd.com>
    Signed-off-by: default avatarSarah Sharp <sarah.a.sharp@linux.intel.com>
    Cc: Alan Stern <stern@rowland.harvard.edu>
    Cc: stable@vger.kernel.org
    f370b996
xhci-hub.c 30.3 KB