diff options
Diffstat (limited to 'drivers/tty/serial/mpc52xx_uart.c')
| -rw-r--r-- | drivers/tty/serial/mpc52xx_uart.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/tty/serial/mpc52xx_uart.c b/drivers/tty/serial/mpc52xx_uart.c index 37eb701b0b46..b566206f42a2 100644 --- a/drivers/tty/serial/mpc52xx_uart.c +++ b/drivers/tty/serial/mpc52xx_uart.c @@ -645,6 +645,8 @@ static irqreturn_t mpc512x_psc_handle_irq(struct uart_port *port) /* Check if it is an interrupt for this port */ psc_num = (port->mapbase & 0xf00) >> 8; + if (psc_num >= ARRAY_SIZE(psc_mclk_clk)) + return IRQ_NONE; if (test_bit(psc_num, &fifoc_int) || test_bit(psc_num + 16, &fifoc_int)) return mpc5xxx_uart_process_int(port); @@ -663,6 +665,8 @@ static int mpc512x_psc_alloc_clock(struct uart_port *port) int err; psc_num = (port->mapbase & 0xf00) >> 8; + if (psc_num >= ARRAY_SIZE(psc_mclk_clk)) + return -EINVAL; clk = devm_clk_get(port->dev, "mclk"); if (IS_ERR(clk)) { @@ -711,6 +715,8 @@ static void mpc512x_psc_relse_clock(struct uart_port *port) struct clk *clk; psc_num = (port->mapbase & 0xf00) >> 8; + if (psc_num >= ARRAY_SIZE(psc_mclk_clk)) + return; clk = psc_mclk_clk[psc_num]; if (clk) { clk_disable_unprepare(clk); @@ -733,6 +739,8 @@ static int mpc512x_psc_endis_clock(struct uart_port *port, int enable) return 0; psc_num = (port->mapbase & 0xf00) >> 8; + if (psc_num >= ARRAY_SIZE(psc_mclk_clk)) + return -ENODEV; psc_clk = psc_mclk_clk[psc_num]; if (!psc_clk) { dev_err(port->dev, "Failed to get PSC clock entry!\n"); |