From: Chuck Ebbert 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 Cc: Pierre Ossman Cc: Signed-off-by: Andrew Morton --- drivers/mmc/host/wbsd.c | 21 ++++++++++----------- 1 file changed, 10 insertions(+), 11 deletions(-) diff -puN drivers/mmc/host/wbsd.c~mmc-wbsd-initialize-tasklets-before-requesting-interrupt drivers/mmc/host/wbsd.c --- a/drivers/mmc/host/wbsd.c~mmc-wbsd-initialize-tasklets-before-requesting-interrupt +++ a/drivers/mmc/host/wbsd.c @@ -1457,17 +1457,7 @@ static int __devinit wbsd_request_irq(st 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(st 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; } _