diff options
| author | roshni.shah <roshni.shah@timesys.com> | 2013-07-18 13:00:46 -0400 |
|---|---|---|
| committer | roshni.shah <roshni.shah@timesys.com> | 2014-01-04 19:33:22 -0500 |
| commit | 2d358ad6703611c8dc0d2a5c6fe547751a603e84 (patch) | |
| tree | a96985b7845f7e5d6f258e4ed726e9714d2adb8f | |
| parent | dbb7aa8c2bcccecbdd9be551e68207d1729d1bf4 (diff) | |
Fixed the uart_tasklet_action NULL pointer deference panic in MVF Serial Driver
| -rw-r--r-- | drivers/tty/serial/mvf.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/tty/serial/mvf.c b/drivers/tty/serial/mvf.c index 037d09e386dc..bbb08a0f3613 100644 --- a/drivers/tty/serial/mvf.c +++ b/drivers/tty/serial/mvf.c @@ -207,7 +207,12 @@ static inline void imx_transmit_buffer(struct imx_port *sport) } if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + { + if (sport->port.state->port.tty) + { uart_write_wakeup(&sport->port); + } + } if (uart_circ_empty(xmit)) imx_stop_tx(&sport->port); @@ -296,7 +301,12 @@ static void dma_tx_work(struct work_struct *w) spin_unlock_irqrestore(&sport->port.lock, flags); if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + { + if (sport->port.state->port.tty) + { uart_write_wakeup(&sport->port); + } + } return; } @@ -346,7 +356,12 @@ static irqreturn_t imx_txint(int irq, void *dev_id) imx_transmit_buffer(sport); if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + { + if (sport->port.state->port.tty) + { uart_write_wakeup(&sport->port); + } + } out: spin_unlock_irqrestore(&sport->port.lock, flags); |