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| author |   Johan Hovold <johan@kernel.org> | 2021-09-29 11:09:37 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-10-05 13:50:52 +0200 |
| commit | 58fc1daa4d2e9789b9ffc880907c961ea7c062cc (patch) | |
| tree | d91bada24b70e2e25c5ff4cdd40796955960a26d /drivers/usb/class/cdc-acm.c | |
| parent | USB: cdc-acm: fix racy tty buffer accesses (diff) | |
| download | wireguard-linux-58fc1daa4d2e9789b9ffc880907c961ea7c062cc.tar.xz wireguard-linux-58fc1daa4d2e9789b9ffc880907c961ea7c062cc.zip | |
USB: cdc-acm: fix break reporting
A recent change that started reporting break events forgot to push the
event to the line discipline, which meant that a detected break would
not be reported until further characters had been receive (the port
could even have been closed and reopened in between).
Fixes: 08dff274edda ("cdc-acm: fix BREAK rx code path adding necessary calls")
Cc: stable@vger.kernel.org
Acked-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20210929090937.7410-3-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/class/cdc-acm.c')
| -rw-r--r-- | drivers/usb/class/cdc-acm.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index c7a1736720e7..7b2e2420ecae 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -340,6 +340,9 @@ static void acm_process_notification(struct acm *acm, unsigned char *buf) acm->iocount.overrun++; spin_unlock_irqrestore(&acm->read_lock, flags); + if (newctrl & ACM_CTRL_BRK) + tty_flip_buffer_push(&acm->port); + if (difference) wake_up_all(&acm->wioctl); |