diff options
| author | Arjan van de Ven <arjan@linux.intel.com> | 2008-05-23 13:04:49 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-06-16 13:20:05 -0700 |
| commit | 3f8c9c7e37568163e4a9d923286b8ca30a42bed6 (patch) | |
| tree | 70db77ba6bf277a8d3209399985fb39534ca419c | |
| parent | 0349d90da8f3cccf7800501dfd70819323fa8302 (diff) | |
| download | lwn-3f8c9c7e37568163e4a9d923286b8ca30a42bed6.tar.gz lwn-3f8c9c7e37568163e4a9d923286b8ca30a42bed6.zip | |
serial: fix enable_irq_wake/disable_irq_wake imbalance in serial_core.c
commit 03a74dcc7eebe6edd778317e82fafdf71e68488c in mainline.
enable_irq_wake() and disable_irq_wake() need to be balanced. However,
serial_core.c calls these for different conditions during the suspend and
resume functions...
This is causing a regular WARN_ON() as found at
http://www.kerneloops.org/search.php?search=set_irq_wake
This patch makes the conditions for triggering the _wake enable/disable
sequence identical.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/serial/serial_core.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c index 3bf9294a2c35..db9920e125dc 100644 --- a/drivers/serial/serial_core.c +++ b/drivers/serial/serial_core.c @@ -2022,6 +2022,8 @@ int uart_suspend_port(struct uart_driver *drv, struct uart_port *port) int uart_resume_port(struct uart_driver *drv, struct uart_port *port) { struct uart_state *state = drv->state + port->line; + struct device *tty_dev; + struct uart_match match = {port, drv}; mutex_lock(&state->mutex); @@ -2031,7 +2033,8 @@ int uart_resume_port(struct uart_driver *drv, struct uart_port *port) return 0; } - if (!port->suspended) { + tty_dev = device_find_child(port->dev, &match, serial_match_port); + if (!port->suspended && device_may_wakeup(tty_dev)) { disable_irq_wake(port->irq); mutex_unlock(&state->mutex); return 0; |