diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2018-12-13 21:44:42 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-12-17 17:04:11 +0300 |
| commit | 2e948218b7c1262a3830823d6620eb227e3d4e3a (patch) | |
| tree | a26c1984023a9a516b6b8d2217c0ba80a0e2da75 /drivers/tty/serial/sh-sci.c | |
| parent | dd1f2250da95e87cb3e612858f94b14f99445a7c (diff) | |
| download | linux-2e948218b7c1262a3830823d6620eb227e3d4e3a.tar.xz | |
serial: sh-sci: Fix crash in rx_timer_fn() on PIO fallback
When falling back to PIO, active_rx must be set to a different value
than cookie_rx[i], else sci_dma_rx_find_active() will incorrectly find a
match, leading to a NULL pointer dereference in rx_timer_fn() later.
Use zero instead, which is the same value as after driver
initialization.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/sh-sci.c')
| -rw-r--r-- | drivers/tty/serial/sh-sci.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 2a08039f7922..e353e03ce260 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -1369,7 +1369,7 @@ fail: dmaengine_terminate_async(chan); for (i = 0; i < 2; i++) s->cookie_rx[i] = -EINVAL; - s->active_rx = -EINVAL; + s->active_rx = 0; s->chan_rx = NULL; sci_start_rx(port); if (!port_lock_held) |