Revert "rt2x00pci: Use PCI MSIs whenever possible"

This reverts commit 9483f40d8d01918b399b4e24d0c1111db0afffeb.

Some devices stop to connect with above commit, see:
https://bugzilla.kernel.org/show_bug.cgi?id=61621

Since there is no clear benefit of having MSI enabled, just revert
change to fix the problem.

Cc: stable@vger.kernel.org # 3.11+
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Jakub Kicinski <kubakici@wp.pl>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/rt2x00/rt2x00pci.c b/drivers/net/wireless/rt2x00/rt2x00pci.c
index 76d95de..dc49e52 100644 (file)
--- a/drivers/net/wireless/rt2x00/rt2x00pci.c
+++ b/drivers/net/wireless/rt2x00/rt2x00pci.c
@@ -105,13 +105,11 @@ int rt2x00pci_probe(struct pci_dev *pci_dev, const struct rt2x00_ops *ops)
                goto exit_release_regions;
        }
 
-       pci_enable_msi(pci_dev);
-
        hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
        if (!hw) {
                rt2x00_probe_err("Failed to allocate hardware\n");
                retval = -ENOMEM;
-               goto exit_disable_msi;
+               goto exit_release_regions;
        }
 
        pci_set_drvdata(pci_dev, hw);
@@ -152,9 +150,6 @@ exit_free_reg:
 exit_free_device:
        ieee80211_free_hw(hw);
 
-exit_disable_msi:
-       pci_disable_msi(pci_dev);
-
 exit_release_regions:
        pci_release_regions(pci_dev);
 
@@ -179,8 +174,6 @@ void rt2x00pci_remove(struct pci_dev *pci_dev)
        rt2x00pci_free_reg(rt2x00dev);
        ieee80211_free_hw(hw);
 
-       pci_disable_msi(pci_dev);
-
        /*
         * Free the PCI device data.
         */