tty_flip.h needs mention of need for tty_flip_buffer_push call .. .

to free memory allocated. If the function is not called in place of 
ld->receive_buf(tty, chead, fhead, count). ld->receive_buf call doesn't 
deallocate the memory.

Also Note:

Our tests show the memory leak fix posted by Paul Fulghum at
http://lkml.org/lkml/2006/6/10/132 experiences data errors. They 
also show that if the first implementation is simply modified to have
tty_flip_buffer_push called instead of ld->receive_buf you will 
have a working driver.
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