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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-12-01 02:34:37 +0100
committerDavid S. Miller <davem@davemloft.net>2013-12-02 16:01:49 -0500
commit8496e85c20e7836b3dec97780e40f420a3ae2801 (patch)
tree9859b6aad0ebc29acd964d46b8236b6af05b8ec4 /include
parent30e56918dd1e6d64350661f186657f6a6f2646e6 (diff)
downloadlinux-8496e85c20e7836b3dec97780e40f420a3ae2801.tar.bz2
PCI / tg3: Give up chip reset and carrier loss handling if PCI device is not present
Modify tg3_chip_reset() and tg3_close() to check if the PCI network adapter device is accessible at all in order to skip poking it or trying to handle a carrier loss in vain when that's not the case. Introduce a special PCI helper function pci_device_is_present() for this purpose. Of course, this uncovers the lack of the appropriate RTNL locking in tg3_suspend() and tg3_resume(), so add that locking in there too. These changes prevent tg3 from burning a CPU at 100% load level for solid several seconds after the Thunderbolt link is disconnected from a Matrox DS1 docking station. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/linux/pci.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 1084a15175e0..25a389566e47 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -960,6 +960,7 @@ void pci_update_resource(struct pci_dev *dev, int resno);
int __must_check pci_assign_resource(struct pci_dev *dev, int i);
int __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align);
int pci_select_bars(struct pci_dev *dev, unsigned long flags);
+bool pci_device_is_present(struct pci_dev *pdev);
/* ROM control related routines */
int pci_enable_rom(struct pci_dev *pdev);