| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 29/35] cdc-acm: fix BREAK rx code path adding necessary calls | Date | Mon, 5 Apr 2021 10:54:04 +0200 |
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From: Oliver Neukum <oneukum@suse.com>
commit 08dff274edda54310d6f1cf27b62fddf0f8d146e upstream.
Counting break events is nice but we should actually report them to the tty layer.
Fixes: 5a6a62bdb9257 ("cdc-acm: add TIOCMIWAIT") Signed-off-by: Oliver Neukum <oneukum@suse.com> Link: https://lore.kernel.org/r/20210311133714.31881-1-oneukum@suse.com Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/usb/class/cdc-acm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -335,8 +335,10 @@ static void acm_ctrl_irq(struct urb *urb acm->iocount.dsr++; if (difference & ACM_CTRL_DCD) acm->iocount.dcd++; - if (newctrl & ACM_CTRL_BRK) + if (newctrl & ACM_CTRL_BRK) { acm->iocount.brk++; + tty_insert_flip_char(&acm->port, 0, TTY_BREAK); + } if (newctrl & ACM_CTRL_RI) acm->iocount.rng++; if (newctrl & ACM_CTRL_FRAMING)
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