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authorJohan Hovold <johan@kernel.org>2021-09-29 11:09:37 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-10-05 13:50:52 +0200
commit58fc1daa4d2e9789b9ffc880907c961ea7c062cc (patch)
treed91bada24b70e2e25c5ff4cdd40796955960a26d /drivers/usb
parent65a205e6113506e69a503b61d97efec43fc10fd7 (diff)
downloadlinux-58fc1daa4d2e9789b9ffc880907c961ea7c062cc.tar.bz2
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')
-rw-r--r--drivers/usb/class/cdc-acm.c3
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);