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fix the no device case

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@715 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2004-04-07 21:01:17 +00:00
parent 333190eb97
commit 52302d7274
1 changed files with 10 additions and 5 deletions
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15
hw/serial.c
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@ -123,10 +123,12 @@ static void serial_ioport_write(void *opaque, uint32_t addr, uint32_t val)
s->lsr &= ~UART_LSR_THRE;
serial_update_irq(s);
ch = val;
do {
ret = write(s->out_fd, &ch, 1);
} while (ret != 1);
if (s->out_fd >= 0) {
ch = val;
do {
ret = write(s->out_fd, &ch, 1);
} while (ret != 1);
}
s->thr_ipending = 1;
s->lsr |= UART_LSR_THRE;
s->lsr |= UART_LSR_TEMT;
@ -267,7 +269,10 @@ SerialState *serial_init(int base, int irq, int fd)
register_ioport_write(base, 8, 1, serial_ioport_write, s);
register_ioport_read(base, 8, 1, serial_ioport_read, s);
if (fd != 0) {
if (fd < 0) {
/* no associated device */
s->out_fd = -1;
} else if (fd != 0) {
qemu_add_fd_read_handler(fd, serial_can_receive1, serial_receive1, s);
s->out_fd = fd;
} else {