bug in AT91 MCI suspend routines

This patch fixes a bug in AT91 mmc host driver, that enables the wakeup
from suspend on card detection pin even if the card detect pin is not
available (==0). If not card detection pin is defined, IRQ0 == FIQ gets
enabled and if some activity is present on that pin, the system gets a
FIQ request, that causes a crash.

Signed-off-by: Anti Sullin <anti.sullin@artecdesign.ee>
Signed-off-by: Nicolas Ferre <nicolas.ferre@rfo.atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

diff --git a/drivers/mmc/host/at91_mci.c b/drivers/mmc/host/at91_mci.c
index bfebd2f..955ea60 100644 (file)
--- a/drivers/mmc/host/at91_mci.c
+++ b/drivers/mmc/host/at91_mci.c
@@ -941,7 +941,7 @@ static int __exit at91_mci_remove(struct platform_device *pdev)
 
        host = mmc_priv(mmc);
 
-       if (host->present != -1) {
+       if (host->board->det_pin) {
                device_init_wakeup(&pdev->dev, 0);
                free_irq(host->board->det_pin, host);
                cancel_delayed_work(&host->mmc->detect);
@@ -972,7 +972,7 @@ static int at91_mci_suspend(struct platform_device *pdev, pm_message_t state)
        struct at91mci_host *host = mmc_priv(mmc);
        int ret = 0;
 
-       if (device_may_wakeup(&pdev->dev))
+       if (host->board->det_pin && device_may_wakeup(&pdev->dev))
                enable_irq_wake(host->board->det_pin);
 
        if (mmc)
@@ -987,7 +987,7 @@ static int at91_mci_resume(struct platform_device *pdev)
        struct at91mci_host *host = mmc_priv(mmc);
        int ret = 0;
 
-       if (device_may_wakeup(&pdev->dev))
+       if (host->board->det_pin && device_may_wakeup(&pdev->dev))
                disable_irq_wake(host->board->det_pin);
 
        if (mmc)