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unregister_chrdev() always returns 0. There is no need to check the return value. Signed-off-by: Akinobu Mita <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Takashi Iwai <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>