From 0d63a8f50e7a7810b0631cd8ea66d44dafb215e6 Mon Sep 17 00:00:00 2001 From: Jacob Keller Date: Tue, 7 Jun 2016 16:08:57 -0700 Subject: [PATCH] fm10k: enable bus master after every reset If an FLR occurs, VF devices will be knocked out of bus master mode, and the driver will be unable to recover from the reset properly, resulting in malicious driver events and an infinite reset loop. In the normal case, the bus master mode will already be enabled and this call will essentially be a no-op. Since we're doing this every reset, it is possible we could remove the other calls to pci_set_master() but it seems not harmful to just leave them in place. Signed-off-by: Jacob Keller Tested-by: Krishneil Singh Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/fm10k/fm10k_pci.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c index b02361c42705..5e40460b041d 100644 --- a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c +++ b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c @@ -174,6 +174,8 @@ static int fm10k_handle_reset(struct fm10k_intfc *interface) rtnl_lock(); + pci_set_master(interface->pdev); + /* reset and initialize the hardware so it is in a known state */ err = hw->mac.ops.reset_hw(hw); if (err) { -- 2.20.1