diff options
Diffstat (limited to 'kernel/drivers/staging/speakup/serialio.c')
| -rw-r--r-- | kernel/drivers/staging/speakup/serialio.c | 27 |
1 files changed, 20 insertions, 7 deletions
diff --git a/kernel/drivers/staging/speakup/serialio.c b/kernel/drivers/staging/speakup/serialio.c index 1d9d51bdf..a5bbb338f 100644 --- a/kernel/drivers/staging/speakup/serialio.c +++ b/kernel/drivers/staging/speakup/serialio.c @@ -6,6 +6,11 @@ #include "spk_priv.h" #include "serialio.h" +#include <linux/serial_core.h> +/* WARNING: Do not change this to <linux/serial.h> without testing that + * SERIAL_PORT_DFNS does get defined to the appropriate value. */ +#include <asm/serial.h> + #ifndef SERIAL_PORT_DFNS #define SERIAL_PORT_DFNS #endif @@ -23,9 +28,15 @@ const struct old_serial_port *spk_serial_init(int index) int baud = 9600, quot = 0; unsigned int cval = 0; int cflag = CREAD | HUPCL | CLOCAL | B9600 | CS8; - const struct old_serial_port *ser = rs_table + index; + const struct old_serial_port *ser; int err; + if (index >= ARRAY_SIZE(rs_table)) { + pr_info("no port info for ttyS%d\n", index); + return NULL; + } + ser = rs_table + index; + /* Divisor, bytesize and parity */ quot = ser->baud_base / baud; cval = cflag & (CSIZE | CSTOPB); @@ -51,7 +62,8 @@ const struct old_serial_port *spk_serial_init(int index) } /* Disable UART interrupts, set DTR and RTS high - * and set speed. */ + * and set speed. + */ outb(cval | UART_LCR_DLAB, ser->port + UART_LCR); /* set DLAB */ outb(quot & 0xff, ser->port + UART_DLL); /* LS of divisor */ outb(quot >> 8, ser->port + UART_DLM); /* MS of divisor */ @@ -100,7 +112,7 @@ static void start_serial_interrupt(int irq) { int rv; - if (synth->read_buff_add == NULL) + if (!synth->read_buff_add) return; rv = request_irq(irq, synth_readbuf_handler, IRQF_SHARED, @@ -126,7 +138,7 @@ void spk_stop_serial_interrupt(void) if (speakup_info.port_tts == 0) return; - if (synth->read_buff_add == NULL) + if (!synth->read_buff_add) return; /* Turn off interrupts */ @@ -145,7 +157,8 @@ int spk_wait_for_xmitr(void) synth->alive = 0; /* No synth any more, so nobody will restart TTYs, and we thus * need to do it ourselves. Now that there is no synth we can - * let application flood anyway */ + * let application flood anyway + */ speakup_start_ttys(); timeouts = 0; return 0; @@ -163,7 +176,8 @@ int spk_wait_for_xmitr(void) /* CTS */ if (--tmout == 0) { /* pr_warn("%s: timed out (cts)\n", - * synth->long_name); */ + * synth->long_name); + */ timeouts++; return 0; } @@ -217,4 +231,3 @@ void spk_serial_release(void) speakup_info.port_tts = 0; } EXPORT_SYMBOL_GPL(spk_serial_release); - |