ALSA: line6: Return error if device not responding
Put an upper bound on how long we will wait for the device to respond to a read/write request (i.e., 100 milliseconds) and return an error if this is reached. Signed-off-by: NChris Rorvick <chris@rorvick.com> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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