ag71xx: keep the rx engine stopped while the link is not up, should hopefully fix...
[openwrt.git] / target / linux / omap24xx / patches-2.6.38 / 506-cbus-retu-irq-handler-locking.patch
1 --- a/drivers/cbus/retu.c
2 +++ b/drivers/cbus/retu.c
3 @@ -198,10 +198,12 @@ static irqreturn_t retu_irq_handler(int
4 u16 idr;
5 u16 imr;
6
7 + mutex_lock(&retu->mutex);
8 idr = __retu_read_reg(retu, RETU_REG_IDR);
9 imr = __retu_read_reg(retu, RETU_REG_IMR);
10 - idr &= ~imr;
11 + mutex_unlock(&retu->mutex);
12
13 + idr &= ~imr;
14 if (!idr) {
15 dev_vdbg(retu->dev, "No IRQ, spurious?\n");
16 return IRQ_NONE;
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