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| author | Arnd Bergmann <arnd@arndb.de> | 2010-06-18 14:58:07 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-10 13:47:44 -0700 |
| commit | 11dbf203922dc70a340417c895c95fb96f6b7068 (patch) | |
| tree | 7c79b79c74a184a7d67d3f54af4e37dee930d11e /drivers/serial | |
| parent | a0821df6e57c8af0053963d0d08c8d5198ea077d (diff) | |
| download | kernel_samsung_smdk4412-11dbf203922dc70a340417c895c95fb96f6b7068.zip kernel_samsung_smdk4412-11dbf203922dc70a340417c895c95fb96f6b7068.tar.gz kernel_samsung_smdk4412-11dbf203922dc70a340417c895c95fb96f6b7068.tar.bz2 | |
tty: avoid recursive BTM in pty_close
When the console has been redirected, a hangup of the tty
will cause tty_release to be called under the big tty_mutex,
which leads to a deadlock because hangup is also called
under the BTM.
This moves the BTM deeper into the tty_hangup function so
we can close the redirected tty without holding the BTM.
In case of pty, we now need to drop the BTM before
calling tty_vhangup.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: John Kacur <jkacur@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/serial')
0 files changed, 0 insertions, 0 deletions