From 599473cf15a3fae78cbc3192cfb38ca04d5abc72 Mon Sep 17 00:00:00 2001 From: Nicolas Pitre Date: Wed, 3 Oct 2007 15:32:57 -0400 Subject: [PATCH] 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 --- drivers/mmc/core/sdio_irq.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) 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) -- 2.20.1