diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-08-17 11:12:28 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-08-17 11:12:28 -0700 |
| commit | 225a389b31b0e3a57dda64055d5e25f93e5c76ac (patch) | |
| tree | 9ac21d481ac11f29be055a0b5513c525574ef8a5 /drivers/tty/serial/pmac_zilog.c | |
| parent | 557e2e2eef90d7d3d4ee5396c1ecee873c3dd46e (diff) | |
| parent | 38f8eefccf3a23c4058a570fa2938a4f553cf8e0 (diff) | |
Merge tag 'tty-3.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull TTY fixes from Greg Kroah-Hartman:
"Here are 4 tiny patches, each fixing a serial driver problem that
people have reported.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"
* tag 'tty-3.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
pmac_zilog,kdb: Fix console poll hook to return instead of loop
serial: mxs-auart: fix the wrong RTS hardware flow control
serial: ifx6x60: fix paging fault on spi_register_driver
serial: Change Kconfig entry for CLPS711X-target
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 654755a990df..333c8d012b0e 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) |