From: Thomas Gleixner Date: Mon, 2 Dec 2013 11:20:36 +0000 (+0100) Subject: mfd: rtsx_pcr: Disable interrupts before cancelling delayed works X-Git-Tag: firefly_0821_release~176^2~4689^2 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=73beb63d290f961c299526852884846b0d868840;p=firefly-linux-kernel-4.4.55.git mfd: rtsx_pcr: Disable interrupts before cancelling delayed works 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 Signed-off-by: Samuel Ortiz --- diff --git a/drivers/mfd/rtsx_pcr.c b/drivers/mfd/rtsx_pcr.c index 11e20afbdcac..705698fd2c7e 100644 --- a/drivers/mfd/rtsx_pcr.c +++ b/drivers/mfd/rtsx_pcr.c @@ -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);