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| author | Stefan Agner <stefan@agner.ch> | 2018-08-28 12:44:24 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-18 15:22:15 +0200 |
| commit | 3216c622a24b0ebb9c159a8d1daf7f17a106b3f5 (patch) | |
| tree | 9b668d89dd59fbe3d5ac155eff6da271bd8a4ef9 /drivers/tty/tty_io.c | |
| parent | e0bf2d4982fe7d9ddaf550dd023803ea286f47fc (diff) | |
| download | linux-stable-3216c622a24b0ebb9c159a8d1daf7f17a106b3f5.tar.gz linux-stable-3216c622a24b0ebb9c159a8d1daf7f17a106b3f5.tar.bz2 linux-stable-3216c622a24b0ebb9c159a8d1daf7f17a106b3f5.zip | |
tty: serial: lpuart: avoid leaking struct tty_struct
The function tty_port_tty_get() gets a reference to the tty. Since
the code is not using tty_port_tty_set(), the reference is kept
even after closing the tty.
Avoid using tty_port_tty_get() by directly access the tty instance.
Since lpuart_start_rx_dma() is called from the .startup() and
.set_termios() callback, it is safe to assume the tty instance is
valid.
Cc: stable@vger.kernel.org # v4.9+
Fixes: 5887ad43ee02 ("tty: serial: fsl_lpuart: Use cyclic DMA for Rx")
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/tty_io.c')
0 files changed, 0 insertions, 0 deletions