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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/m32r_sio.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/m32r_sio.c')
| -rw-r--r-- | drivers/tty/serial/m32r_sio.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/tty/serial/m32r_sio.c b/drivers/tty/serial/m32r_sio.c index 68f2c53e0b54..5702828fb62e 100644 --- a/drivers/tty/serial/m32r_sio.c +++ b/drivers/tty/serial/m32r_sio.c @@ -266,9 +266,11 @@ static void m32r_sio_start_tx(struct uart_port *port) if (!(up->ier & UART_IER_THRI)) { up->ier |= UART_IER_THRI; serial_out(up, UART_IER, up->ier); - serial_out(up, UART_TX, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - up->port.icount.tx++; + if (!uart_circ_empty(xmit)) { + serial_out(up, UART_TX, xmit->buf[xmit->tail]); + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); + up->port.icount.tx++; + } } while((serial_in(up, UART_LSR) & UART_EMPTY) != UART_EMPTY); #else |