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| author | Johan Hovold <johan@kernel.org> | 2026-09-07 11:51:30 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-09-10 17:09:42 +0200 |
| commit | be4219dd98608736e13e0b790ef742b76a13254d (patch) | |
| tree | 3271c7295994bc8109cf2288ed4fa3378c4a0ac4 /tools/lib/python/kdoc/python_version.py | |
| parent | 88c7e458af53ff781a3f1051708395892b325576 (diff) | |
| download | linux-next-be4219dd98608736e13e0b790ef742b76a13254d.tar.gz linux-next-be4219dd98608736e13e0b790ef742b76a13254d.zip | |
USB: cdc-acm: fix racy TIOCMIWAIT implementation
Check the wakeup condition after adding the task to the waitqueue and
updating the task state to avoid missing a racing modem status update or
disconnect.
Store the old icount on entry and do not update it in the completion
handler to avoid missing events or reporting spurious ones (due to modem
status changes before TIOCMIWAIT was called).
Fixes: 5a6a62bdb925 ("cdc-acm: add TIOCMIWAIT")
Cc: stable <stable@kernel.org>
Cc: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20260907095130.130636-1-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/lib/python/kdoc/python_version.py')
0 files changed, 0 insertions, 0 deletions