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Diffstat (limited to 'arch/um/drivers/chan_kern.c')
| -rw-r--r-- | arch/um/drivers/chan_kern.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/um/drivers/chan_kern.c b/arch/um/drivers/chan_kern.c index c09dbdfa298..db3082b4da4 100644 --- a/arch/um/drivers/chan_kern.c +++ b/arch/um/drivers/chan_kern.c @@ -291,6 +291,9 @@ int write_chan(struct list_head *chans, const char *buf, int len, struct chan *chan = NULL; int n, ret = 0; + if (len == 0) + return 0; + list_for_each(ele, chans) { chan = list_entry(ele, struct chan, list); if (!chan->output || (chan->ops->write == NULL)) |