diff options
Diffstat (limited to 'drivers/dahdi/wctdm24xxp/base.c')
| -rw-r--r-- | drivers/dahdi/wctdm24xxp/base.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/dahdi/wctdm24xxp/base.c b/drivers/dahdi/wctdm24xxp/base.c index cd0ae98..f04703f 100644 --- a/drivers/dahdi/wctdm24xxp/base.c +++ b/drivers/dahdi/wctdm24xxp/base.c @@ -3564,6 +3564,42 @@ static int wctdm_dacs(struct dahdi_chan *dst, struct dahdi_chan *src) return 0; } +/** + * wctdm_wait_for_ready + * + * Check if the board has finished any setup and is ready to start processing + * calls. + */ +int wctdm_wait_for_ready(const struct wctdm *wc) +{ + while (!wc->initialized) { + if (fatal_signal_pending(current)) + return -EIO; + msleep_interruptible(250); + } + return 0; +} + +/** + * wctdm_chanconfig - Called when the channels are being configured. + * + * Ensure that the card is completely ready to go before we allow the channels + * to be completely configured. This is to allow lengthy initialization + * actions to take place in background on driver load and ensure we're synced + * up by the time dahdi_cfg is run. + * + */ +static int +wctdm_chanconfig(struct file *file, struct dahdi_chan *chan, int sigtype) +{ + struct wctdm *wc = chan->pvt; + + if ((file->f_flags & O_NONBLOCK) && !wc->initialized) + return -EAGAIN; + + return wctdm_wait_for_ready(wc); +} + static const struct dahdi_span_ops wctdm24xxp_analog_span_ops = { .owner = THIS_MODULE, .hooksig = wctdm_hooksig, @@ -3571,6 +3607,7 @@ static const struct dahdi_span_ops wctdm24xxp_analog_span_ops = { .close = wctdm_close, .ioctl = wctdm_ioctl, .watchdog = wctdm_watchdog, + .chanconfig = wctdm_chanconfig, .dacs = wctdm_dacs, #ifdef VPM_SUPPORT .echocan_create = wctdm_echocan_create, |