e1000e: fix pci-device enable-counter balance

commit 4e0855dff094b0d56d6b5b271e0ce7851cc1e063 upstream.

This patch removes redundant and unbalanced pci_disable_device() from
__e1000_shutdown(). pci_clear_master() is enough, device can go into
suspended state with elevated enable_cnt.

Bug was introduced in commit 23606cf5d1192c2b17912cb2ef6e62f9b11de133
("e1000e / PCI / PM: Add basic runtime PM support (rev. 4)") in v2.6.35

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Bruce Allan <bruce.w.allan@intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Borislav Petkov <bp@suse.de>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 7e88aaf..c80b4b4 100644 (file)
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -5535,7 +5535,7 @@ static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake,
         */
        e1000e_release_hw_control(adapter);
 
-       pci_disable_device(pdev);
+       pci_clear_master(pdev);
 
        return 0;
 }