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author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-07-12 14:12:35 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-07-12 14:12:35 -0700 |
commit | 78b3d1c24deb46a8bed6e1be816dc64d344777f8 (patch) | |
tree | abb70e844263a9c81f02ac83fec116f25caafa80 /drivers | |
parent | 56a50f20eade9a1777375d40e04434788b6ff414 (diff) | |
parent | 34c4eda809e1efb16c554c07bb5df4c8ace9424e (diff) | |
download | linux-78b3d1c24deb46a8bed6e1be816dc64d344777f8.tar.gz linux-78b3d1c24deb46a8bed6e1be816dc64d344777f8.tar.bz2 linux-78b3d1c24deb46a8bed6e1be816dc64d344777f8.zip |
Merge tag 'tty-3.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial fixes from Greg KH:
"Here are some small serial fixes that resolve some reported problems
that started in 3.15 with some serial drivers.
And there's a new dt binding for a serial driver, which was all that
was needed for the renesas serial driver"
* tag 'tty-3.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
serial: sh-sci: Add device tree support for r8a7{778,740,3a4} and sh73a0
serial: imx: Fix build breakage
serial: arc_uart: Use uart_circ_empty() for open-coded comparison
serial: Test for no tx data on tx restart
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/tty/serial/arc_uart.c | 2 | ||||
-rw-r--r-- | drivers/tty/serial/imx.c | 3 | ||||
-rw-r--r-- | drivers/tty/serial/ip22zilog.c | 2 | ||||
-rw-r--r-- | drivers/tty/serial/m32r_sio.c | 8 | ||||
-rw-r--r-- | drivers/tty/serial/pmac_zilog.c | 3 | ||||
-rw-r--r-- | drivers/tty/serial/sunsab.c | 3 | ||||
-rw-r--r-- | drivers/tty/serial/sunzilog.c | 2 |
7 files changed, 19 insertions, 4 deletions
diff --git a/drivers/tty/serial/arc_uart.c b/drivers/tty/serial/arc_uart.c index c9f5c9dcc15c..008c223eaf26 100644 --- a/drivers/tty/serial/arc_uart.c +++ b/drivers/tty/serial/arc_uart.c @@ -177,7 +177,7 @@ static void arc_serial_tx_chars(struct arc_uart_port *uart) uart->port.icount.tx++; uart->port.x_char = 0; sent = 1; - } else if (xmit->tail != xmit->head) { /* TODO: uart_circ_empty */ + } else if (!uart_circ_empty(xmit)) { ch = xmit->buf[xmit->tail]; xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); uart->port.icount.tx++; diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index e2f93874989b..044e86d528ae 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -567,6 +567,9 @@ static void imx_start_tx(struct uart_port *port) struct imx_port *sport = (struct imx_port *)port; unsigned long temp; + if (uart_circ_empty(&port->state->xmit)) + return; + if (USE_IRDA(sport)) { /* half duplex in IrDA mode; have to disable receive mode */ temp = readl(sport->port.membase + UCR4); diff --git a/drivers/tty/serial/ip22zilog.c b/drivers/tty/serial/ip22zilog.c index 1efd4c36ba0c..99b7b8697861 100644 --- a/drivers/tty/serial/ip22zilog.c +++ b/drivers/tty/serial/ip22zilog.c @@ -603,6 +603,8 @@ static void ip22zilog_start_tx(struct uart_port *port) } else { struct circ_buf *xmit = &port->state->xmit; + if (uart_circ_empty(xmit)) + return; writeb(xmit->buf[xmit->tail], &channel->data); ZSDELAY(); ZS_WSYNC(channel); 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 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"); } diff --git a/drivers/tty/serial/sunsab.c b/drivers/tty/serial/sunsab.c index 80a58eca785b..2f57df9a71d9 100644 --- a/drivers/tty/serial/sunsab.c +++ b/drivers/tty/serial/sunsab.c @@ -427,6 +427,9 @@ static void sunsab_start_tx(struct uart_port *port) struct circ_buf *xmit = &up->port.state->xmit; int i; + if (uart_circ_empty(xmit)) + return; + up->interrupt_mask1 &= ~(SAB82532_IMR1_ALLS|SAB82532_IMR1_XPR); writeb(up->interrupt_mask1, &up->regs->w.imr1); diff --git a/drivers/tty/serial/sunzilog.c b/drivers/tty/serial/sunzilog.c index a85db8b87156..02df3940b95e 100644 --- a/drivers/tty/serial/sunzilog.c +++ b/drivers/tty/serial/sunzilog.c @@ -703,6 +703,8 @@ static void sunzilog_start_tx(struct uart_port *port) } else { struct circ_buf *xmit = &port->state->xmit; + if (uart_circ_empty(xmit)) + return; writeb(xmit->buf[xmit->tail], &channel->data); ZSDELAY(); ZS_WSYNC(channel); |