From 0170591bb06788034ae72bfa56e42f283ab3de5a Mon Sep 17 00:00:00 2001 From: Keith Busch Date: Wed, 29 Mar 2017 22:49:11 -0500 Subject: [PATCH] PCI/MSI: Skip disabling disconnected devices Check the device connected state prior to executing device shutdown operations or writing MSI messages so that tear down on disconnected devices completes quicker. Tested-by: Krishna Dhulipala Signed-off-by: Keith Busch Signed-off-by: Bjorn Helgaas Reviewed-by: Christoph Hellwig Reviewed-by: Wei Zhang --- drivers/pci/msi.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index d571bc330686..33e766a9dd91 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -298,7 +298,7 @@ void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg) { struct pci_dev *dev = msi_desc_to_pci_dev(entry); - if (dev->current_state != PCI_D0) { + if (dev->current_state != PCI_D0 || pci_dev_is_disconnected(dev)) { /* Don't touch the hardware now */ } else if (entry->msi_attrib.is_msix) { void __iomem *base = pci_msix_desc_addr(entry); @@ -1001,6 +1001,11 @@ void pci_msix_shutdown(struct pci_dev *dev) if (!pci_msi_enable || !dev || !dev->msix_enabled) return; + if (pci_dev_is_disconnected(dev)) { + dev->msix_enabled = 0; + return; + } + /* Return the device with MSI-X masked as initial states */ for_each_pci_msi_entry(entry, dev) { /* Keep cached states to be restored */ -- 2.39.2