From: Michael Buesch Date: Tue, 21 Feb 2006 16:58:18 +0000 (+0100) Subject: [PATCH] bcm43xx: Workaround init_board vs IRQ race. X-Git-Tag: v2.6.17-rc1~158^2~37 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bf7b876043e6e1390b1234d740f4fd9af20b3b9e;p=linux-2.6 [PATCH] bcm43xx: Workaround init_board vs IRQ race. The proper fix for this is to move IRQ enabling to the end of init_board. But this is nontrivial and needs to be done with care. Stay with this cheap workaround for now. Signed-off-by: Michael Buesch Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_main.c b/drivers/net/wireless/bcm43xx/bcm43xx_main.c index 6195c2a151..57306a6584 100644 --- a/drivers/net/wireless/bcm43xx/bcm43xx_main.c +++ b/drivers/net/wireless/bcm43xx/bcm43xx_main.c @@ -2079,12 +2079,19 @@ static irqreturn_t bcm43xx_interrupt_handler(int irq, void *dev_id, struct pt_re bcm43xx_interrupt_ack(bcm, reason, mask); - /* disable all IRQs. They are enabled again in the bottom half. */ - bcm->irq_savedstate = bcm43xx_interrupt_disable(bcm, BCM43xx_IRQ_ALL); - - /* save the reason code and call our bottom half. */ - bcm->irq_reason = reason; - tasklet_schedule(&bcm->isr_tasklet); + /* Only accept IRQs, if we are initialized properly. + * This avoids an RX race while initializing. + * We should probably not enable IRQs before we are initialized + * completely, but some careful work is needed to fix this. I think it + * is best to stay with this cheap workaround for now... . + */ + if (likely(bcm->initialized)) { + /* disable all IRQs. They are enabled again in the bottom half. */ + bcm->irq_savedstate = bcm43xx_interrupt_disable(bcm, BCM43xx_IRQ_ALL); + /* save the reason code and call our bottom half. */ + bcm->irq_reason = reason; + tasklet_schedule(&bcm->isr_tasklet); + } spin_unlock(&bcm->lock);