diff options
| author | Olof Johansson <olof@lixom.net> | 2012-09-05 15:35:48 -0700 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2012-09-05 15:35:48 -0700 |
| commit | 1875962377574b4edb7b164001e3e341c25290d5 (patch) | |
| tree | 374a5299403ec21e2d9a66a6548ce876a388b589 /drivers/tty/serial/pmac_zilog.c | |
| parent | 5cbee140a28c2746449ae31e85738043ae4da927 (diff) | |
| parent | c88a79a7789b2909ad1cf69ea2c9142030bbd6f4 (diff) | |
| download | op-kernel-dev-1875962377574b4edb7b164001e3e341c25290d5.zip op-kernel-dev-1875962377574b4edb7b164001e3e341c25290d5.tar.gz | |
Merge branch 'soc-core' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/dt
* 'soc-core' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
ARM: mach-shmobile: Add compilation support for dtbs using 'make dtbs'
+ sync to 3.6-rc3
Diffstat (limited to 'drivers/tty/serial/pmac_zilog.c')
| -rw-r--r-- | drivers/tty/serial/pmac_zilog.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c index 654755a..333c8d0 100644 --- a/drivers/tty/serial/pmac_zilog.c +++ b/drivers/tty/serial/pmac_zilog.c @@ -1348,10 +1348,16 @@ static int pmz_verify_port(struct uart_port *port, struct serial_struct *ser) static int pmz_poll_get_char(struct uart_port *port) { struct uart_pmac_port *uap = (struct uart_pmac_port *)port; + int tries = 2; - while ((read_zsreg(uap, R0) & Rx_CH_AV) == 0) - udelay(5); - return read_zsdata(uap); + while (tries) { + if ((read_zsreg(uap, R0) & Rx_CH_AV) != 0) + return read_zsdata(uap); + if (tries--) + udelay(5); + } + + return NO_POLL_CHAR; } static void pmz_poll_put_char(struct uart_port *port, unsigned char c) |
