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serial: doc: .break_ctl() is called with port->mutex() held

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Note that mutex_lock() should not be called with interrupts disabled.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Geert Uytterhoeven 2016-03-14 16:16:14 +01:00 • committed by Jonathan Corbet
commit fbe3128bcf
1 changed files with 1 additions and 2 deletions
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Documentation/serial/driver
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@ -177,8 +177,7 @@ hardware.
should be terminated when another call is made with a zero
ctl.
Locking: none.
Interrupts: caller dependent.
Locking: caller holds port->mutex
This call must not sleep
startup(port)