usb: cdc-wdm:Fix loss of data due to autosuspend
The guarding flag must be set and tested under spinlock and cleared before the URBs are resubmitted in resume. Signed-off-by: NOliver Neukum <neukum@b1-systems.de> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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