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Disable interrupts in filter in order to avoid interrupt storm and

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CPU starvation
This commit is contained in:
Oleksandr Tymoshenko 2012-12-13 03:33:01 +00:00
parent 34be301210
commit 60aa1fe695
1 changed files with 4 additions and 7 deletions
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11
sys/dev/smc/if_smc.c
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@ -807,6 +807,10 @@ smc_intr(void *context)
struct smc_softc *sc;
sc = (struct smc_softc *)context;
/*
* Block interrupts in order to let smc_task_intr to kick in
*/
smc_write_1(sc, MSK, 0);
taskqueue_enqueue_fast(sc->smc_tq, &sc->smc_intr);
return (FILTER_HANDLED);
}
@ -826,13 +830,6 @@ smc_task_intr(void *context, int pending)
smc_select_bank(sc, 2);
/*
* Get the current mask, and then block all interrupts while we're
* working.
*/
if ((ifp->if_capenable & IFCAP_POLLING) == 0)
smc_write_1(sc, MSK, 0);
/*
* Find out what interrupts are flagged.
*/