Date: Thu, 4 Aug 2005 11:28:46 +0400 (MSD) From: "Felix-KM" <Felix-KM@yandex.ru> To: freebsd-hackers@freebsd.org Subject: bus_teardown_intr() Message-ID: <42F1C3AE.000003.07372@mfront7.yandex.ru> In-Reply-To: <42F1C1F9.000001.17496@ariel.yandex.ru> References: <42F1C1F9.000001.17496@ariel.yandex.ru>
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Sorry, I forgot to indicate the theme.
>Hello.
>Help me please to understand how the function bus_teardown_intr() works.
>I have a device driver containing following code:
>
>#define DEVICE2SOFTC(device) ((struct dev_softc *)device_get_softc(device))
>
>static void dev_intr(void *arg);
>
>struct dev_softc {
> ...
> int rid_irq;
> struct resource* res_irq;
> void *intr_cookie;
> ...
>};
>
>static int
>dev_attach(device_t device)
>{
> ...
>
> dev_sc->rid_irq = 0;
> dev_sc->res_irq = bus_alloc_resource_any(device, SYS_RES_IRQ,
> &(dev_sc->rid_irq), RF_SHAREABLE|RF_ACTIVE);
> if (dev_sc->res_irq == NULL)
> {
> uprintf("!!! Could not map interrupt !!!\n");
> goto fail;
> }
>
> if (bus_setup_intr(device, dev_sc->res_irq, INTR_TYPE_TTY,
> dev_intr, dev_sc, &dev_sc->intr_cookie))
> {
> uprintf("!!! Could not setup irq !!!\n");
> goto fail;
> }
>
> ...
>
>fail:
> return ENXIO;
>}
>
>static int
>dev_detach(device_t device)
>{
> struct dev_softc *dev_sc = DEVICE2SOFTC(device);
>
> destroy_dev(dev_sc->device);
>
> if (bus_teardown_intr(device, dev_sc->res_irq, dev_sc->intr_cookie) != 0);
> printf("bus_teardown_intr ERROR !!!\n");
>
> bus_release_resource(device, SYS_RES_IRQ, dev_sc->rid_irq,
> dev_sc->res_irq);
> ...
>
> return 0;
>}
>
>static void
>dev_intr(void *arg)
>{
> struct dev_softc *dev_sc = (struct dev_softc *)arg;
>
> ...
>}
>
>When the driver is loaded the following message is shown:
>
>dev0 port 0x9800-0x980f,0x9400-0x947f irq 16 at device 10.0 on pci1
>
>i.e., as I understand, resourses are allocated normally.
>
>But when the driver is being unloaded the following message appear:
>
>bus_teardown_intr ERROR !!!
>
>What have I done wrong? Hint me please how to use bus_teardown_intr()
>function correctly?
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