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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-08-27 07:08:39 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-08-27 07:08:39 -0700 |
| commit | 9db48aaf18d675ac41f550c9384154e0c00de2ef (patch) | |
| tree | 70a19b9164c103e5f52dddff609e01672f8ef616 /drivers/tty/serial/pmac_zilog.c | |
| parent | 0592969e73ae50ce6852d1aff3d222a335289094 (diff) | |
| parent | fea7a08acb13524b47711625eebea40a0ede69a0 (diff) | |
Merge 3.6-rc3 into driver-core-next
This picks up the printk fixes in 3.6-rc3 that are needed in this branch.
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 | 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 654755a990d..333c8d012b0 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) |