4.4-stable review patch. If anyone has any objections, please let me know.
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From: Mika Westerberg mika.westerberg@linux.intel.com
commit f2a659f7d8d5da803836583aa16df06bdf324252 upstream.
The driver misses implementation of PM hook that undoes what ->freeze_noirq() does after the hibernation image is created. This means the control channel is not resumed properly and the Thunderbolt bus becomes useless in later stages of hibernation (when the image is stored or if the operation fails).
Fix this by pointing ->thaw_noirq to driver nhi_resume_noirq(). This makes sure the control channel is resumed properly.
Fixes: 23dd5bb49d98 ("thunderbolt: Add suspend/hibernate support") Signed-off-by: Mika Westerberg mika.westerberg@linux.intel.com Reviewed-by: Andy Shevchenko andy.shevchenko@gmail.com Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/thunderbolt/nhi.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/thunderbolt/nhi.c +++ b/drivers/thunderbolt/nhi.c @@ -627,6 +627,7 @@ static const struct dev_pm_ops nhi_pm_op * we just disable hotplug, the * pci-tunnels stay alive. */ + .thaw_noirq = nhi_resume_noirq, .restore_noirq = nhi_resume_noirq, };