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(parent: d4855e1) | patch
n_tty: Protect minimum_to_wake reset for concurrent readers
authorPeter Hurley <peter@hurleysoftware.com>
Thu, 7 Nov 2013 19:01:57 +0000 (14:01 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 25 Nov 2013 17:17:49 +0000 (09:17 -0800)
commitaebf045382edb32bd763d8edea02a559e7dc41e9
treeeeba9a7cacf8a5a14500af01eaf626839655a480tree | snapshot
parentd4855e1fc03c2bb32dd64badf51cec5a2a26ab2acommit | diff
n_tty: Protect minimum_to_wake reset for concurrent readers

With multiple, concurrent readers (each waiting to acquire the
atomic_read_lock mutex), a departing reader may mistakenly reset
minimum_to_wake after a new reader has already set a new value.

Protect the minimum_to_wake reset with the atomic_read_lock critical
section.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/tty/n_tty.c diff | blob | history
Domain: System / Uncategorized;