wcaxx: Use startup/shutdown callbacks to protect access to channel registers.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
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@ -33,6 +33,7 @@
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#include <linux/moduleparam.h>
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#include <linux/firmware.h>
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#include <linux/crc32.h>
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#include <linux/interrupt.h>
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#include <stdbool.h>
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@ -1986,8 +1987,7 @@ static void wcaxx_handle_receive(struct wcxb *xb, void *_frame)
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wc->module_poll_time = wc->framecount + MODULE_POLL_TIME_MS;
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}
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/* TODO: This protection needs to be thought about. */
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if (!test_bit(DAHDI_FLAGBIT_REGISTERED, &wc->span.flags))
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if (!test_bit(DAHDI_FLAGBIT_RUNNING, &wc->span.flags))
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return;
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for (j = 0; j < DAHDI_CHUNKSIZE; j++) {
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@ -2012,8 +2012,7 @@ static void wcaxx_handle_transmit(struct wcxb *xb, void *_frame)
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wcxb_spi_handle_interrupt(wc->master);
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/* TODO: This protection needs to be thought about. */
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if (!test_bit(DAHDI_FLAGBIT_REGISTERED, &wc->span.flags))
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if (!test_bit(DAHDI_FLAGBIT_RUNNING, &wc->span.flags))
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return;
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_dahdi_transmit(&wc->span);
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@ -3384,36 +3383,41 @@ wcaxx_chanconfig(struct file *file, struct dahdi_chan *chan, int sigtype)
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}
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/*
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* wcaxx_assigned - Called when span is assigned.
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* @span: The span that is now assigned.
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*
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* This function is called by the core of DAHDI after the span number and
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* channel numbers have been assigned.
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* wcaxx_span_shutdown - Called when span is unassigned or shutdown.
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* @span: The span that is shutdown
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*
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*/
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static void wcaxx_assigned(struct dahdi_span *span)
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static int wcaxx_span_shutdown(struct dahdi_span *span)
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{
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struct dahdi_span *s;
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struct dahdi_device *ddev = span->parent;
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struct wcaxx *wc = NULL;
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list_for_each_entry(s, &ddev->spans, device_node) {
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wc = container_of(s, struct wcaxx, span);
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if (!test_bit(DAHDI_FLAGBIT_REGISTERED, &s->flags))
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return;
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}
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struct wcaxx *wc = container_of(span, struct wcaxx, span);
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clear_bit(DAHDI_FLAGBIT_RUNNING, &span->flags);
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synchronize_irq(wc->xb.pdev->irq);
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return 0;
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}
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/*
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* wcaxx_span_startup - Called when span is unassigned or shutdown.
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* @span: The span that is shutdown
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*
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*/
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static int wcaxx_span_startup(struct file *file, struct dahdi_span *span)
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{
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set_bit(DAHDI_FLAGBIT_RUNNING, &span->flags);
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return 0;
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}
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static const struct dahdi_span_ops wcaxx_span_ops = {
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.owner = THIS_MODULE,
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.hooksig = wcaxx_hooksig,
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.shutdown = wcaxx_span_shutdown,
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.startup = wcaxx_span_startup,
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.open = wcaxx_open,
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.close = wcaxx_close,
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.ioctl = wcaxx_ioctl,
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.watchdog = wcaxx_watchdog,
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.chanconfig = wcaxx_chanconfig,
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.dacs = wcaxx_dacs,
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.assigned = wcaxx_assigned,
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#ifdef VPM_SUPPORT
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.echocan_create = wcaxx_echocan_create,
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.echocan_name = wcaxx_echocan_name,
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