diff options
| -rw-r--r-- | drivers/tty/serial/mrst_max3110.c | 35 |
1 files changed, 17 insertions, 18 deletions
diff --git a/drivers/tty/serial/mrst_max3110.c b/drivers/tty/serial/mrst_max3110.c index 565779dc7aa..db0448ae59d 100644 --- a/drivers/tty/serial/mrst_max3110.c +++ b/drivers/tty/serial/mrst_max3110.c @@ -43,6 +43,7 @@ #include <linux/kthread.h> #include <linux/spi/spi.h> +#include <linux/pm.h> #include "mrst_max3110.h" @@ -494,19 +495,9 @@ static int serial_m3110_startup(struct uart_port *port) port->state->port.low_latency = 1; if (max->irq) { - max->read_thread = NULL; - ret = request_irq(max->irq, serial_m3110_irq, - IRQ_TYPE_EDGE_FALLING, "max3110", max); - if (ret) { - max->irq = 0; - pr_err(PR_FMT "unable to allocate IRQ, polling\n"); - } else { - /* Enable RX IRQ only */ - config |= WC_RXA_IRQ_ENABLE; - } - } - - if (max->irq == 0) { + /* Enable RX IRQ only */ + config |= WC_RXA_IRQ_ENABLE; + } else { /* If IRQ is disabled, start a read thread for input data */ max->read_thread = kthread_run(max3110_read_thread, max, "max3110_read"); @@ -520,8 +511,6 @@ static int serial_m3110_startup(struct uart_port *port) ret = max3110_out(max, config); if (ret) { - if (max->irq) - free_irq(max->irq, max); if (max->read_thread) kthread_stop(max->read_thread); max->read_thread = NULL; @@ -543,9 +532,6 @@ static void serial_m3110_shutdown(struct uart_port *port) max->read_thread = NULL; } - if (max->irq) - free_irq(max->irq, max); - /* Disable interrupts from this port */ config = WC_TAG | WC_SW_SHDI; max3110_out(max, config); @@ -846,6 +832,16 @@ static int serial_m3110_probe(struct spi_device *spi) goto err_kthread; } + if (max->irq) { + ret = request_irq(max->irq, serial_m3110_irq, + IRQ_TYPE_EDGE_FALLING, "max3110", max); + if (ret) { + max->irq = 0; + dev_warn(&spi->dev, + "unable to allocate IRQ, will use polling method\n"); + } + } + spi_set_drvdata(spi, max); pmax = max; @@ -873,6 +869,9 @@ static int serial_m3110_remove(struct spi_device *dev) free_page((unsigned long)max->con_xmit.buf); + if (max->irq) + free_irq(max->irq, max); + if (max->main_thread) kthread_stop(max->main_thread); |