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authorPeter Hurley <peter@hurleysoftware.com>2016-01-09 21:13:44 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-01-26 23:17:54 -0800
commit0bfd464d3fdd5bb322f9cace4cc47f1796545cf7 (patch)
tree39464f856fd4dc6b58c31e2cfbbbb882ce3b7ec1 /drivers/tty/tty_mutex.c
parent92e963f50fc74041b5e9e744c330dca48e04f08d (diff)
tty: Wait interruptibly for tty lock on reopen
Allow a signal to interrupt the wait for a tty reopen; eg., if the tty has starting final close and is waiting for the device to drain. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Cc: stable <stable@vger.kernel.org> # 4.4 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/tty_mutex.c')
-rw-r--r--drivers/tty/tty_mutex.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/tty/tty_mutex.c b/drivers/tty/tty_mutex.c
index 77703a391207..d2f3c4cd697f 100644
--- a/drivers/tty/tty_mutex.c
+++ b/drivers/tty/tty_mutex.c
@@ -19,6 +19,14 @@ void __lockfunc tty_lock(struct tty_struct *tty)
}
EXPORT_SYMBOL(tty_lock);
+int tty_lock_interruptible(struct tty_struct *tty)
+{
+ if (WARN(tty->magic != TTY_MAGIC, "L Bad %p\n", tty))
+ return -EIO;
+ tty_kref_get(tty);
+ return mutex_lock_interruptible(&tty->legacy_mutex);
+}
+
void __lockfunc tty_unlock(struct tty_struct *tty)
{
if (WARN(tty->magic != TTY_MAGIC, "U Bad %p\n", tty))