From 0029227f1bc30b6c809ae751f9e7af6cef900997 Mon Sep 17 00:00:00 2001 From: Andiry Xu Date: Mon, 27 Dec 2010 17:39:02 +0800 Subject: xHCI: synchronize irq in xhci_suspend() Synchronize the interrupts instead of free them in xhci_suspend(). This will prevent a double free when the host is suspended and then the card removed. Set the flag hcd->msix_enabled when using MSI-X, and check the flag in suspend_common(). MSI-X synchronization will be handled by xhci_suspend(), and MSI/INTx will be synchronized in suspend_common(). This patch should be queued for the 2.6.37 stable tree. Reported-by: Matthew Garrett Signed-off-by: Andiry Xu Signed-off-by: Sarah Sharp Cc: stable@kernel.org --- drivers/usb/core/hcd-pci.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'drivers/usb/core') diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c index b55d46070a2..f71e8e307e0 100644 --- a/drivers/usb/core/hcd-pci.c +++ b/drivers/usb/core/hcd-pci.c @@ -405,7 +405,12 @@ static int suspend_common(struct device *dev, bool do_wakeup) return retval; } - synchronize_irq(pci_dev->irq); + /* If MSI-X is enabled, the driver will have synchronized all vectors + * in pci_suspend(). If MSI or legacy PCI is enabled, that will be + * synchronized here. + */ + if (!hcd->msix_enabled) + synchronize_irq(pci_dev->irq); /* Downstream ports from this root hub should already be quiesced, so * there will be no DMA activity. Now we can shut down the upstream -- cgit v1.2.3-70-g09d2