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| author | Johan Hovold <jhovold@gmail.com> | 2013-03-21 12:36:53 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-25 13:50:51 -0700 |
| commit | c371de14b9a23aadb57accab0ca2e5dd28de7f16 (patch) | |
| tree | aec827c692f6574509ca8eb7a00278e4926d7cc4 /drivers/usb/serial/generic.c | |
| parent | 980373b7918b8023be6b7df03857f494ae124d0b (diff) | |
| download | linux-c371de14b9a23aadb57accab0ca2e5dd28de7f16.tar.gz linux-c371de14b9a23aadb57accab0ca2e5dd28de7f16.tar.bz2 linux-c371de14b9a23aadb57accab0ca2e5dd28de7f16.zip | |
USB: serial: wake up MSR-wait queue on disconnect
Make sure processes waiting for modem-status changes are woken up at
disconnect.
This is needed for custom subdriver TIOCMIWAIT-implementations which do
not yet handle hangup.
Even though processes on the tty-port wait queue are woken up at hangup
the wake-up call in usb-serial disconnect is still needed if a woken-up
process may go back to sleep (e.g. due to an incomplete
TIOCMIWAIT-implementation). If a disconnect occurs after a hangup, any
process waiting for changes will not be woken up a second time by the
tty-layer as the port will then have been disassociated from the tty.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/serial/generic.c')
0 files changed, 0 insertions, 0 deletions