diff options
| author |   Atsushi Nemoto <anemo@mba.ocn.ne.jp> | 2007-10-29 14:37:23 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-30 08:06:55 -0700 |
| commit | 23f42b7b2e538a27bc457a9ba12a6656343dc5ea (patch) | |
| tree | da39ae248360520d1d430c936682a4834da7a262 /drivers/serial/serial_txx9.c | |
| parent | intel-iommu: Fix array overflow (diff) | |
| download | linux-dev-23f42b7b2e538a27bc457a9ba12a6656343dc5ea.tar.xz linux-dev-23f42b7b2e538a27bc457a9ba12a6656343dc5ea.zip | |
serial: fix serial_txx9 console initialization
Since commit 97d97224ff361e08777fb33e0fd193ca877dac28 ("[SERIAL] Fix
console initialisation ordering"), serial_core calls ->pm() on
initialization even if the port was used for console.
This behaviour breaks serial_txx9 console since The serial_txx9 driver
initialize its port entirely on its ->pm() method if new state was 0.
This patch adds checking for oldstate value to fix this probelm.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
| -rw-r--r-- | drivers/serial/serial_txx9.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/serial/serial_txx9.c b/drivers/serial/serial_txx9.c index 6846a6c38b6d..7ad21925869a 100644 --- a/drivers/serial/serial_txx9.c +++ b/drivers/serial/serial_txx9.c @@ -657,7 +657,15 @@ static void serial_txx9_pm(struct uart_port *port, unsigned int state, unsigned int oldstate) { - if (state == 0) + /* + * If oldstate was -1 this is called from + * uart_configure_port(). In this case do not initialize the + * port now, because the port was already initialized (for + * non-console port) or should not be initialized here (for + * console port). If we initialized the port here we lose + * serial console settings. + */ + if (state == 0 && oldstate != -1) serial_txx9_initialize(port); } |