tty: fix ldisc lock inversion trace

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This is caused by tty_release using tty_lock_pair to lock both sides of
the pty/tty pair, and then tty_ldisc_release dropping and relocking one
side only.  We can drop both fine, so drop both to avoid any lock
ordering concerns.

Rework the release path to fix the new locking model.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Alan Cox 2012-05-29 13:45:16 +01:00 • committed by Linus Torvalds

parent d3ca8b64b9

commit 8f6576ad47

1 changed files with 25 additions and 16 deletions

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drivers/tty/tty_ldisc.c

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