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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-14 02:52:12 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-14 02:52:12 +0400 |
| commit | ca17749259d26f7ddbb0678790d5d534018d0a6b (patch) | |
| tree | 730e0bd336e78d673760df2b4116277af1c8c495 /drivers/tty/serial/pmac_zilog.c | |
| parent | 07584d4a356ef52c084e1e4fedc22858ffc2f8b2 (diff) | |
| parent | 1795cd9b3a91d4b5473c97f491d63892442212ab (diff) | |
| download | linux-ca17749259d26f7ddbb0678790d5d534018d0a6b.tar.xz | |
Merge 3.16-rc5 into tty-next.
We want those fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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"); } |