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| author | David S. Miller <davem@davemloft.net> | 2014-07-17 01:09:34 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-07-17 01:09:34 +0400 |
| commit | 1a98c69af1ecd97bfd1f4e4539924a9192434e36 (patch) | |
| tree | a243defcf921ea174f8e43fce11d06830a6a9c36 /drivers/tty/serial/pmac_zilog.c | |
| parent | 7a575f6b907ea5d207d2b5010293c189616eae34 (diff) | |
| parent | b6603fe574af289dbe9eb9fb4c540bca04f5a053 (diff) | |
| download | linux-1a98c69af1ecd97bfd1f4e4539924a9192434e36.tar.xz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/tty/serial/pmac_zilog.c')
| -rw-r--r-- | drivers/tty/serial/pmac_zilog.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c index 8193635103ee..f7ad5b903055 100644 --- a/drivers/tty/serial/pmac_zilog.c +++ b/drivers/tty/serial/pmac_zilog.c @@ -653,6 +653,8 @@ static void pmz_start_tx(struct uart_port *port) } else { struct circ_buf *xmit = &port->state->xmit; + if (uart_circ_empty(xmit)) + goto out; write_zsdata(uap, xmit->buf[xmit->tail]); zssync(uap); xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); @@ -661,6 +663,7 @@ static void pmz_start_tx(struct uart_port *port) if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) uart_write_wakeup(&uap->port); } + out: pmz_debug("pmz: start_tx() done.\n"); } |