From cef33400d0349fb24b6f8b7dea79b66e3144fd8b Mon Sep 17 00:00:00 2001 From: Chuck Ebbert Date: Thu, 12 Jun 2008 15:21:42 -0700 Subject: [PATCH] mmc: wbsd: initialize tasklets before requesting interrupt With CONFIG_DEBUG_SHIRQ set we will get an interrupt as soon as we allocate one. Tasklets may be scheduled in the interrupt handler but they will be initialized after the handler returns, causing a BUG() in kernel/softirq.c when they run. Should fix this Fedora bug report: https://bugzilla.redhat.com/show_bug.cgi?id=449817 Signed-off-by: Chuck Ebbert Acked-by: Pierre Ossman Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/mmc/host/wbsd.c | 21 ++++++++++----------- 1 file changed, 10 insertions(+), 11 deletions(-) diff --git a/drivers/mmc/host/wbsd.c b/drivers/mmc/host/wbsd.c index be624a049c67..c303e7f57ab4 100644 --- a/drivers/mmc/host/wbsd.c +++ b/drivers/mmc/host/wbsd.c @@ -1457,17 +1457,7 @@ static int __devinit wbsd_request_irq(struct wbsd_host *host, int irq) int ret; /* - * Allocate interrupt. - */ - - ret = request_irq(irq, wbsd_irq, IRQF_SHARED, DRIVER_NAME, host); - if (ret) - return ret; - - host->irq = irq; - - /* - * Set up tasklets. + * Set up tasklets. Must be done before requesting interrupt. */ tasklet_init(&host->card_tasklet, wbsd_tasklet_card, (unsigned long)host); @@ -1480,6 +1470,15 @@ static int __devinit wbsd_request_irq(struct wbsd_host *host, int irq) tasklet_init(&host->finish_tasklet, wbsd_tasklet_finish, (unsigned long)host); + /* + * Allocate interrupt. + */ + ret = request_irq(irq, wbsd_irq, IRQF_SHARED, DRIVER_NAME, host); + if (ret) + return ret; + + host->irq = irq; + return 0; }