https://github.com/torvalds/linux
Revision 4175f3e31cc7157669aa66d46dc79de6ae0126ce authored by Alan Cox on 28 October 2009, 20:12:32 UTC, committed by Greg Kroah-Hartman on 18 November 2009, 00:42:28 UTC
Original discussion:
http://thread.gmane.org/gmane.linux.usb.general/23217/focus=23248
or
http://marc.info/?l=linux-usb&m=125553790714133&w=2

The tty_port code inherited a bug common to various drivers it was based
upon. If the tty is opened O_NONBLOCK we do not wait for the carrier to be
raised but we must still raise our modem lines if appropriate.

(There is a second question here about whether we should do so if CLOCAL is
 set but that can wait)

Signed-off-by: Alan Cox <alan@linux.intel.com>
Reported-by: Karl Hiramoto <karl@hiramoto.org>
Tested-by:  Karl Hiramoto <karl@hiramoto.org>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
1 parent ac50e95
History
Tip revision: 4175f3e31cc7157669aa66d46dc79de6ae0126ce authored by Alan Cox on 28 October 2009, 20:12:32 UTC
tty_port: If we are opened non blocking we still need to raise the carrier
Tip revision: 4175f3e
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