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由 Daniel Mack 提交于
-1 is not a good return value as it means -EPERM, "not permitted". Choose -ENOTSUPP instead, which is what the code really wants to tell its callers. Signed-off-by: NDaniel Mack <daniel@caiaq.de> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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