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mfd: rtsx_pcr: Disable interrupts before cancelling delayed works

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This fixes a kernel panic when resuming from suspend to RAM.
Without this fix an interrupt hits after the delayed work is canceled
and thus requeues it. So we end up freeing an armed timer.

Cc: stable@vger.kernel.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Thomas Gleixner 2013-12-02 12:20:36 +01:00 committed by Samuel Ortiz
parent 78fd82238d
commit 73beb63d29
1 changed files with 8 additions and 2 deletions
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10
drivers/mfd/rtsx_pcr.c
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@ -1228,8 +1228,14 @@ static void rtsx_pci_remove(struct pci_dev *pcidev)
pcr->remove_pci = true;
cancel_delayed_work(&pcr->carddet_work);
cancel_delayed_work(&pcr->idle_work);
/* Disable interrupts at the pcr level */
spin_lock_irq(&pcr->lock);
rtsx_pci_writel(pcr, RTSX_BIER, 0);
pcr->bier = 0;
spin_unlock_irq(&pcr->lock);
cancel_delayed_work_sync(&pcr->carddet_work);
cancel_delayed_work_sync(&pcr->idle_work);
mfd_remove_devices(&pcidev->dev);