diff options
| author | Jan Beulich <JBeulich@suse.com> | 2015-10-19 04:23:29 -0600 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2015-12-12 23:19:37 -0800 |
| commit | be06998f96ecb93938ad2cce46c4289bf7cf45bc (patch) | |
| tree | bf9734ce50b08ea653bfdce65119ee0c2f227fe0 /drivers/net/ethernet/intel/igb/igb_main.c | |
| parent | d17c7868b2f8e329dcee4ecd2f5d16cfc9b26ac8 (diff) | |
| download | linux-be06998f96ecb93938ad2cce46c4289bf7cf45bc.tar.bz2 | |
igb: fix NULL derefs due to skipped SR-IOV enabling
The combined effect of commits 6423fc3416 ("igb: do not re-init SR-IOV
during probe") and ceee3450b3 ("igb: make sure SR-IOV init uses the
right number of queues") causes VFs no longer getting set up, leading
to NULL pointer dereferences due to the adapter's ->vf_data being NULL
while ->vfs_allocated_count is non-zero. The first commit not only
neglected the side effect of igb_sriov_reinit() that the second commit
tried to account for, but also that of setting IGB_FLAG_HAS_MSIX,
without which igb_enable_sriov() is effectively a no-op. Calling
igb_{,re}set_interrupt_capability() as done here seems to address this,
but I'm not sure whether this is better than sinply reverting the other
two commits.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/igb/igb_main.c')
| -rw-r--r-- | drivers/net/ethernet/intel/igb/igb_main.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index 061e1026af76..fa3b4cbea23b 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -2858,6 +2858,13 @@ static void igb_probe_vfs(struct igb_adapter *adapter) if ((hw->mac.type == e1000_i210) || (hw->mac.type == e1000_i211)) return; + /* Of the below we really only want the effect of getting + * IGB_FLAG_HAS_MSIX set (if available), without which + * igb_enable_sriov() has no effect. + */ + igb_set_interrupt_capability(adapter, true); + igb_reset_interrupt_capability(adapter); + pci_sriov_set_totalvfs(pdev, 7); igb_enable_sriov(pdev, max_vfs); |