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| author | Jason Wessel <jason.wessel@windriver.com> | 2010-03-08 21:50:11 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-03-19 07:17:57 -0700 |
| commit | 336cee42dd52824e360ab419eab4e8888eb054ec (patch) | |
| tree | 893babf1f6804b35a944ac413d16f7107d922e14 /drivers/char | |
| parent | 231443665882a02214c3748b9f86615a3ce9e5c2 (diff) | |
| download | linux-336cee42dd52824e360ab419eab4e8888eb054ec.tar.gz linux-336cee42dd52824e360ab419eab4e8888eb054ec.tar.bz2 linux-336cee42dd52824e360ab419eab4e8888eb054ec.zip | |
tty_port,usb-console: Fix usb serial console open/close regression
Commit e1108a63e10d344284011cccc06328b2cd3e5da3 ("usb_serial: Use the
shutdown() operation") breaks the ability to use a usb console
starting in 2.6.33. This was observed when using
console=ttyUSB0,115200 as a boot argument with an FTDI device. The
error is:
ftdi_sio ttyUSB0: ftdi_submit_read_urb - failed submitting read urb, error -22
The handling of the ASYNCB_INITIALIZED changed in 2.6.32 such that in
tty_port_shutdown() it always clears the flag if it is set. The fix
is to add a variable to the tty_port struct to indicate when the tty
port is a console.
CC: Alan Cox <alan@linux.intel.com>
CC: Alan Stern <stern@rowland.harvard.edu>
CC: Oliver Neukum <oliver@neukum.org>
CC: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/tty_port.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/char/tty_port.c b/drivers/char/tty_port.c index be492dd66437..a3bd1d0b66cf 100644 --- a/drivers/char/tty_port.c +++ b/drivers/char/tty_port.c @@ -119,7 +119,7 @@ EXPORT_SYMBOL(tty_port_tty_set); static void tty_port_shutdown(struct tty_port *port) { mutex_lock(&port->mutex); - if (port->ops->shutdown && + if (port->ops->shutdown && !port->console && test_and_clear_bit(ASYNCB_INITIALIZED, &port->flags)) port->ops->shutdown(port); mutex_unlock(&port->mutex); |