From: Nicolas Pitre Date: Wed, 3 Oct 2007 19:32:57 +0000 (-0400) Subject: sdio: make the IRQ thread more resilient in the presence of bad states X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=599473cf15a3fae78cbc3192cfb38ca04d5abc72;p=linux-beck.git sdio: make the IRQ thread more resilient in the presence of bad states Currently we print a message about some bad states wrt function IRQ handlers but return 0 from process_sdio_pending_irqs() nevertheless. This can lead to an infinite loop as nothing might have cleared the condition for the pending card interrupt from the host controller by the time host->ops->enable_sdio_irq(host, 1) is called. Signed-off-by: Nicolas Pitre Signed-off-by: Pierre Ossman --- diff --git a/drivers/mmc/core/sdio_irq.c b/drivers/mmc/core/sdio_irq.c index e7865059e126..3bd3021f5e80 100644 --- a/drivers/mmc/core/sdio_irq.c +++ b/drivers/mmc/core/sdio_irq.c @@ -45,16 +45,22 @@ static int process_sdio_pending_irqs(struct mmc_card *card) printk(KERN_WARNING "%s: pending IRQ for " "non-existant function\n", mmc_card_id(card)); + ret = -EINVAL; } else if (func->irq_handler) { func->irq_handler(func); count++; - } else + } else { printk(KERN_WARNING "%s: pending IRQ with no handler\n", sdio_func_id(func)); + ret = -EINVAL; + } } } - return count; + if (count) + return count; + + return ret; } static int sdio_irq_thread(void *_host)